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/* InListPassiveTarget */ memcpy(buf, "\xd4\x4a\x01\x01\x00\xff\xff\x00\x00", 9); buf[5] = (uint8_t)((systemCode >> 8) & 0xff); buf[6] = (uint8_t)((systemCode >> 0) & 0xff); ret = rwCommand(buf, 9, response, &responseLen);
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- ¥Ç¡¼¥¿¥·¡¼¥ÈÃæ¤Îµ»ö
- "9. Command overview"
- Í×ÅÀ¤Î¤Þ¤È¤á
- NTAG ¥³¥Þ¥ó¥É¤ËÂФ¹¤ëºÇû¤Î¥ì¥¹¥Ý¥ó¥¹¤Ï 4¥Ó¥Ã¥È¤Î ACK or NACK ¤Ç¤¢¤ë
- Ah¡§ Acknowledge (ACK)
- 0h¡§ NAK for invalid argument (i.e. invalid page address)
- 1h¡§ NAK for parity or CRC error
- 4h¡§ NAK for invalid authentication counter overflow
- 5h¡§ NAK for EEPROM write error
- ¥³¥Þ¥ó¥É¤ËÉÕÍ¿¤¹¤ë CRC ÃÍ¤Ï ISO/IEC 14443 ¤Îµ¬Ìó¤Ë½àµò¤Î¤³¤È ¡Ê¼ÂÁõÎã¡Ë
- GET_VERSION ¥³¥Þ¥ó¥É
NTAG À½ÉʤΥС¼¥¸¥ç¥ó,¥¹¥È¥ì¡¼¥¸¥µ¥¤¥ºÅù¤òÆÀ¤ë¡£Configuration Pages ¤Î¥¢¥É¥ì¥¹¼èÆÀ¤ËɬÍ×- ¥ê¥¯¥¨¥¹¥È
- ¥³¥Þ¥ó¥É 1 ¥Ð¥¤¥È¡Ê60h¡Ë ¡Ü CRC 2 ¥Ð¥¤¥È
- ¥ì¥¹¥Ý¥ó¥¹
- OK¡§ ¥Ç¡¼¥¿ 8 ¥Ð¥¤¥È¡Ü CRC 2 ¥Ð¥¤¥È
- NG¡§ NAK ³ÆÃÍ
NTAG 21x GET_VERSION ¥ì¥¹¥Ý¥ó¥¹¥Ç¡¼¥¿¤ÎÆâÍÆ Byte no. Description NTAG213 NTAG215 NTAG216 Interpretation 0 fixed Header 00h 00h 00h 1 vendor ID 04h 04h 04h NXP Semiconductors 2 product type 04h 04h 04h NTAG 3 product subtype 02h 02h 02h 50 pF 4 major product version 01h 01h 01h 1 5 minor product version 00h 00h 00h V0 6 storage size 0Fh 11h 13h see following information 7 protocol type 03h 03h 03h ISO/IEC 14443-3 compliant
NTAG À½Éʤμ±ÊÌÊýË¡
storage size ¤Î¾å°Ì 7¥Ó¥Ã¥È¤òÉä¹æ¤Ê¤·À°¿ôÃÍ n ¤È¤·¤Æ²ò¼á¤¹¤ë¡£»ÈÍѲÄǽ¤Ê¥æ¡¼¥¶¡¼¥á¥â¥ê¤Î¹ç·×¥µ¥¤¥º¤Ï¡¢ºÇ²¼°Ì¥Ó¥Ã¥È¤¬ 0 ¤Î¾ì¹ç¤Ë¤Ï 2^n ¤Ç¤¢¤êºÇ²¼°Ì¥Ó¥Ã¥È¤¬ 1 ¤Î¾ì¹ç¤Ë¤Ï 2^n ¡Á 2^(n+1) ¤Ç¤¢¤ë¡£¤³¤ì¤ò¼±Ê̤ËÍøÍѤ¹¤ë¡£
NTAG213 ¤Ç¤Î GET_VERSION ¥ì¥¹¥Ý¥ó¥¹¼ÂÎã
HEX: 00 04 04 02 01 00 0F 03
--> 0x0F = BIN: 00001111 --> BIN: 0000111 = 0x07 --> 2^7 = 128, 2^(7+1) = 256
¢¨ 128¡Á256 ¥Ð¥¤¥È¤Î¥æ¡¼¥¶¡¼¥á¥â¥ê¶õ´Ö¤ò»ý¤ÄÀ½ÉÊ¤Ï NTAG213¡Ê144 ¥Ð¥¤¥È¡Ë
NTAG216 ¤Ç¤Î GET_VERSION ¥ì¥¹¥Ý¥ó¥¹¼ÂÎã
HEX: 00 04 04 02 01 00 13 03
--> 0x13 = BIN: 00010011 --> BIN: 0001001 = 0x09 --> 2^9 = 512, 2^(9+1) = 1024
¢¨ 512¡Á1024 ¥Ð¥¤¥È¤Î¥æ¡¼¥¶¡¼¥á¥â¥ê¶õ´Ö¤ò»ý¤ÄÀ½ÉÊ¤Ï NTAG216¡Ê888 ¥Ð¥¤¥È¡Ë
- ¥ê¥¯¥¨¥¹¥È
- READ ¥³¥Þ¥ó¥É
½êÄê¤Î¥Ú¡¼¥¸¥¢¥É¥ì¥¹¤«¤é»Ï¤Þ¤ë 4 ¥Ú¡¼¥¸Ê¬¡Ê16 ¥Ð¥¤¥È¡Ë¤Î¥Ç¡¼¥¿¤òÆÀ¤ë- ¥ê¥¯¥¨¥¹¥È
- ¥³¥Þ¥ó¥É 1 ¥Ð¥¤¥È¡Ê30h¡Ë¡Ü ³«»Ï¥¢¥É¥ì¥¹ 1 ¥Ð¥¤¥È ¡Ü CRC 2 ¥Ð¥¤¥È
- ¥ì¥¹¥Ý¥ó¥¹
- OK¡§ ¥Ç¡¼¥¿ 16 ¥Ð¥¤¥È¡Ü CRC 2 ¥Ð¥¤¥È
- NG¡§ NAK ³ÆÃÍ
- ¥ê¥¯¥¨¥¹¥È
- WRITE ¥³¥Þ¥ó¥É
½êÄê¤Î¥Ú¡¼¥¸¥¢¥É¥ì¥¹¤Ø 1 ¥Ú¡¼¥¸Ê¬¡Ê4 ¥Ð¥¤¥È¡Ë¤Î¥Ç¡¼¥¿¤ò½ñ¤¹þ¤à- ¥ê¥¯¥¨¥¹¥È
- ¥³¥Þ¥ó¥É 1¥Ð¥¤¥È¡ÊA2h¡Ë¡Ü Âоݥ¢¥É¥ì¥¹ 1 ¥Ð¥¤¥È ¡Ü ¥Ç¡¼¥¿ 4 ¥Ð¥¤¥È ¡Ü CRC 2 ¥Ð¥¤¥È
- ¥ì¥¹¥Ý¥ó¥¹
- OK¡§ ACK
- NG¡§ NAK ³ÆÃÍ
- ¥ê¥¯¥¨¥¹¥È
- PWD_AUTH ¥³¥Þ¥ó¥É
¥Ñ¥¹¥ï¡¼¥É¤ÇÊݸ¤ì¤¿Îΰè¤Ø¤Î¥¢¥¯¥»¥¹Í×µá¤ËÀè¹Ô¤·¤Æ¥Ñ¥¹¥ï¡¼¥Éǧ¾Ú¤òÍ׵᤹¤ë¡£¤³¤³¤Ç¹ÎÄê±þÅú¤Ç¤¢¤ë PACK ¤¬ÆÀ¤é¤ì¤ì¤Ð½êÄê¤Î¥¢¥¯¥»¥¹¤¬²Äǽ¤È¤Ê¤ë¡ÊPACK ¤ÎÃͤϥǥե©¥ë¥È 0x0000 ¡£Êѹ¹²Ä¡Ë- ¥ê¥¯¥¨¥¹¥È
- ¥³¥Þ¥ó¥É 1 ¥Ð¥¤¥È¡Ê1Bh¡Ë¡Ü ¥Ñ¥¹¥ï¡¼¥É 4 ¥Ð¥¤¥È ¡Ü CRC 2 ¥Ð¥¤¥È
- ¥ì¥¹¥Ý¥ó¥¹
- OK¡§ PACK 2 ¥Ð¥¤¥È
- NG¡§ NAK ³ÆÃÍ
- ¥ê¥¯¥¨¥¹¥È
- NTAG ¥³¥Þ¥ó¥É¤ËÂФ¹¤ëºÇû¤Î¥ì¥¹¥Ý¥ó¥¹¤Ï 4¥Ó¥Ã¥È¤Î ACK or NACK ¤Ç¤¢¤ë
2. Android API ¤Ë¤è¤ë NTAG21x ¤Î¥Ï¥ó¥É¥ê¥ó¥°¤Ë¤Ä¤¤¤Æ
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public final class NfcA
Provides access to NFC-A (ISO 14443-3A) properties and I/O operations on a Tag.
Acquire a NfcA object using get(Tag).
The primary NFC-A I/O operation is transceive(byte[]). Applications must implement their own protocol stack on top of transceive(byte[]).
NfcA get (Tag tag)
Get an instance of NfcA for the given tag.
Returns null if NfcA was not enumerated in getTechList(). This indicates the tag does not support NFC-A.
Parameters
Returns
byte[] transceive (byte[] data)
Get an instance of NfcA for the given tag.
Send raw NFC-A commands to the tag and receive the response.
Applications must not append the EoD (CRC) to the payload, it will be automatically calculated.
Applications must only send commands that are complete bytes, for example a SENS_REQ is not possible (these are used to manage tag polling and initialization).
Use getMaxTransceiveLength() to retrieve the maximum number of bytes that can be sent with transceive(byte[]).
This is an I/O operation and will block until complete. It must not be called from the main application thread. A blocked call will be canceled with IOException if close() is called from another thread.
Parameters
Returns
Throws
¥³¡¼¥É¤ò½ñ¤¤¤Æ»î¤¹
- ¥Ñ¥¹¥ï¡¼¥É¤òÀßÄꤹ¤ë¡Êwrite Í׵ᤫ¤é¤ÎÊݸî¡Ë
- NTAG21x ¼ïÊ̤ò³Îǧ
- ¥Ñ¥¹¥ï¡¼¥É¤È¤·¤Æ "0000" ¤òÀßÄê
- ¥Ú¡¼¥¸ 04h °Ê¹ß¤òÊݸîÂоݤȤ¹¤ë
: if (isNfcA) { int ntagMaxPage = -1, ntagConfPage0; NfcA nfca = NfcA.get(tag); try { nfca.connect(); } catch (IOException e) { Log.d(TAG, "NfcA.connect() err: " + e.toString()); return; } // NTAG ¼ïÊ̼èÆÀ try { byte[] res = nfca.transceive(new byte[]{ (byte) 0x60, // GET_VERSION }); Log.d(TAG, "GET_VERSION reslen=" + res.length + " res=" + bytesToHexString(res)); if (res.length == 8) { if (res[0] == 0x00 && res[1] == 0x04 && res[2] == 0x04 && res[3] == 0x02) { byte ntagStorageSize = res[6]; if (ntagStorageSize == 0x0F) { ntagMaxPage = 45; // 0x2D = NTAG213 } else if (ntagStorageSize == 0x11) { ntagMaxPage = 135; // 0x87 = NTAG215 } else if (ntagStorageSize == 0x13) { ntagMaxPage = 231; // 0xE7 = NTAG216 } } } } catch (IOException e) { Log.d(TAG, "GET_VERSION err:" + e.toString()); } if (ntagMaxPage == -1) { Log.d(TAG, "is not NTAG21x"); if (nfca.isConnected()) { try { nfca.close(); } catch (IOException e) { Log.d(TAG, "NfcA.close() err: " + e.toString()); } } return; } // Congiguration Pages ³«»Ï°ÌÃÖ ntagConfPage0 = ntagMaxPage - 4; try { // ¥Ñ¥¹¥ï¡¼¥É¤òÀßÄê int page = ntagConfPage0 + 2; // config page 2 byte[] res = nfca.transceive( new byte[]{ (byte) 0xA2, // WRITE (byte) page, '0', '0', '0', '0' } ); Log.d(TAG, "WRITE p" + page + " reslen=" + res.length + " res=" + bytesToHexString(res)); // Êݸ»Ï¥Ú¡¼¥¸¤òÀßÄê page = ntagConfPage0; // config page 0 res = nfca.transceive( new byte[]{ (byte) 0xA2, // WRITE (byte) page, (byte) 0x04, (byte) 0x00, (byte) 0x00, (byte) 0x04 // Êݸ»Ï¥Ú¡¼¥¸ } ); Log.d(TAG, "WRITE p" + page + " reslen=" + res.length + " res=" + bytesToHexString(res)); } catch (IOException e) { Log.d(TAG, "WRITE err:" + e.toString()); } if (nfca.isConnected()) { try { nfca.close(); } catch (IOException e) { e.printStackTrace(); } } } :
- ¾å¤Î¥³¡¼¥É¤Ë¤è¤ê NTAG213 ¤Î¥Ú¡¼¥¸ 04h °Ê¹ß¤Ø¤Î½ñ¤¹þ¤ß¤Ë¥Ñ¥¹¥ï¡¼¥Éǧ¾ÚÄ̲᤬ɬ¿Ü¤È¤Ê¤Ã¤¿¾õ¶·
AUTH0 ¤ËÊݸ»Ï¥Ú¡¼¥¸»ØÄê
PROT ¥Ó¥Ã¥È¤Ï¥Ç¥Õ¥©¥ë¥È¤Î 0 ¤Î¤Þ¤Þ
- ¥Ñ¥¹¥ï¡¼¥É¤òÀßÄꤹ¤ë¡Êread / write Í׵ᤫ¤é¤ÎÊݸî¡Ë
- NTAG21x ¼ïÊ̤ò³Îǧ
- ¥Ñ¥¹¥ï¡¼¥É¤È¤·¤Æ "0000" ¤òÀßÄê
- ¥Ú¡¼¥¸ 04h °Ê¹ß¤òÊݸîÂоݤȤ¹¤ë
- PROT ¥Ó¥Ã¥È¤òΩ¤Æ read Í׵ᤫ¤é¤ÎÊݸî¤â͸ú¤Ë
: if (isNfcA) { int ntagMaxPage = -1, ntagConfPage0; NfcA nfca = NfcA.get(tag); try { nfca.connect(); } catch (IOException e) { Log.d(TAG, "NfcA.connect() err: " + e.toString()); return; } // NTAG ¼ïÊ̼èÆÀ try { byte[] res = nfca.transceive(new byte[]{ (byte) 0x60, // GET_VERSION }); Log.d(TAG, "GET_VERSION reslen=" + res.length + " res=" + bytesToHexString(res)); if (res.length == 8) { if (res[0] == 0x00 && res[1] == 0x04 && res[2] == 0x04 && res[3] == 0x02) { byte ntagStorageSize = res[6]; if (ntagStorageSize == 0x0F) { ntagMaxPage = 45; // 0x2D = NTAG213 } else if (ntagStorageSize == 0x11) { ntagMaxPage = 135; // 0x87 = NTAG215 } else if (ntagStorageSize == 0x13) { ntagMaxPage = 231; // 0xE7 = NTAG216 } } } } catch (IOException e) { Log.d(TAG, "GET_VERSION err:" + e.toString()); } if (ntagMaxPage == -1) { Log.d(TAG, "is not NTAG21x"); if (nfca.isConnected()) { try { nfca.close(); } catch (IOException e) { Log.d(TAG, "NfcA.close() err: " + e.toString()); } } return; } // Congiguration Pages ³«»Ï°ÌÃÖ ntagConfPage0 = ntagMaxPage - 4; try { // ¥Ñ¥¹¥ï¡¼¥É¤òÀßÄê int page = ntagConfPage0 + 2; // config page 2 byte[] res = nfca.transceive( new byte[]{ (byte) 0xA2, // WRITE (byte) page, '0', '0', '0', '0' } ); Log.d(TAG, "WRITE p" + page + " reslen=" + res.length + " res=" + bytesToHexString(res)); // Êݸ»Ï¥Ú¡¼¥¸¤òÀßÄê page = ntagConfPage0; // config page 0 res = nfca.transceive( new byte[]{ (byte) 0xA2, // WRITE (byte) page, (byte) 0x04, (byte) 0x00, (byte) 0x00, (byte) 0x04 // Êݸ»Ï¥Ú¡¼¥¸ } ); Log.d(TAG, "WRITE p" + page + " reslen=" + res.length + " res=" + bytesToHexString(res)); // read Í׵ᤫ¤é¤ÎÊݸî¤â͸ú¤Ë page = ntagConfPage0 + 1; // config page 1 res = nfca.transceive( new byte[]{ (byte) 0xA2, // WRITE (byte) page, (byte) 0x80, // read,write protect (byte) 0x05, (byte) 0x00, (byte) 0x00 } ); Log.d(TAG, "WRITE p" + page + " reslen=" + res.length + " res=" + bytesToHexString(res)); } catch (IOException e) { Log.d(TAG, "WRITE err:" + e.toString()); } if (nfca.isConnected()) { try { nfca.close(); } catch (IOException e) { e.printStackTrace(); } } } :
- ¾å¤Î¥³¡¼¥É¤Ë¤è¤ê NTAG213 ¤Î¥Ú¡¼¥¸ 04h °Ê¹ß¤ÎÆɤ߽ñ¤¤Ë¥Ñ¥¹¥ï¡¼¥Éǧ¾ÚÄ̲᤬ɬ¿Ü¤È¤Ê¤Ã¤¿¾õ¶·
- ¥Ñ¥¹¥ï¡¼¥É¤ò²ò½ü¤¹¤ë
- NTAG21x ¼ïÊ̤ò³Îǧ
- PWD_AUTH ¥³¥Þ¥ó¥É¤Ç¥Ñ¥¹¥ï¡¼¥É "0000" ¤òÄ󼨤·Ç§¾ÚÍ×µá
- AUTH0 ¤Ë͸úÈϰϳ°¤Î¥Ú¡¼¥¸ÈÖ¹æ FFh ¤ò½ñ¤¹þ¤à¤³¤È¤Ç¥Ñ¥¹¥ï¡¼¥ÉÊݸî¤ò̵¸ú²½¤¹¤ë
: if (isNfcA) { int ntagMaxPage = -1, ntagConfPage0; NfcA nfca = NfcA.get(tag); try { nfca.connect(); } catch (IOException e) { Log.d(TAG, "NfcA.connect() err: " + e.toString()); return; } // NTAG ¼ïÊ̼èÆÀ try { byte[] res = nfca.transceive(new byte[]{ (byte) 0x60, // GET_VERSION }); Log.d(TAG, "GET_VERSION reslen=" + res.length + " res=" + bytesToHexString(res)); if (res.length == 8) { if (res[0] == 0x00 && res[1] == 0x04 && res[2] == 0x04 && res[3] == 0x02) { byte ntagStorageSize = res[6]; if (ntagStorageSize == 0x0F) { ntagMaxPage = 45; // 0x2D = NTAG213 } else if (ntagStorageSize == 0x11) { ntagMaxPage = 135; // 0x87 = NTAG215 } else if (ntagStorageSize == 0x13) { ntagMaxPage = 231; // 0xE7 = NTAG216 } } } } catch (IOException e) { Log.d(TAG, "GET_VERSION err:" + e.toString()); } if (ntagMaxPage == -1) { Log.d(TAG, "is not NTAG21x"); if (nfca.isConnected()) { try { nfca.close(); } catch (IOException e) { Log.d(TAG, "NfcA.close() err: " + e.toString()); } } return; } // Congiguration Pages ³«»Ï°ÌÃÖ ntagConfPage0 = ntagMaxPage - 4; // ¥Ñ¥¹¥ï¡¼¥Éǧ¾Ú // Ä̲᤹¤ì¤Ð close ¤¹¤ë¤Þ¤Ç¸¢¸Â¤¬»ý³ boolean authOk = false; try { byte[] res = nfca.transceive( new byte[]{ (byte) 0x1b, // PWD_AUTH '0', '0', '0', '0' } ); Log.d(TAG, "PWD_AUTH reslen=" + res.length + " res=" + bytesToHexString(res)); if (res.length == 2) { authOk = true; } } catch (IOException e) { Log.d(TAG, "PWD_AUTH err:" + e.toString()); } if (authOk) { // ¥Ñ¥¹¥ï¡¼¥ÉÊݸî¤ò²ò½ü try { int page = ntagConfPage0; // config page 0 byte[] res = nfca.transceive( new byte[]{ (byte) 0xA2, // WRITE (byte) page, (byte) 0x04, (byte) 0x00, (byte) 0x00, (byte) 0xFF // ͸úÈÏ°ÏĶ¤Î¥Ú¡¼¥¸»ØÄê¤ÇÊݸî¤Ï̵¸ú¤Ë } ); Log.d(TAG, "WRITE p" + page + " reslen=" + res.length + " res=" + bytesToHexString(res)); } catch (IOException e) { Log.d(TAG, "PWD WRITE err:" + e.toString()); } } if (nfca.isConnected()) { try { nfca.close(); } catch (IOException e) { Log.d(TAG, "NfcA.close() err: " + e.toString()); } } } :
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START, ability, abroad,
accept, access, accident,
according, account, action,
activity, actually, add,
addition, additional, address,
adult, advance, advanced,
advantage, advice, advise,
age, agency, agent,
agree, ahead, air,
airline, allow, amount,
angry, announce, announcement,
anxious, appear, appearance,
application, apply, approach,
area, arrange, arrangement,
arrival, arrive, article,
attack, attend, attention,
available, average, avoid,
aware, balance, balanced,
bar, base, basic,
bear, beat, beauty,
benefit, bill, bit,
block, blood, board,
borrow, boss, branch,
break, broad, broadcast,
brush, budget, burn,
business, busy, cab,
cable, call, cancel,
capital, care, careful,
case, cash, catalog,
catch, cause, century,
certain, certainly, chance,
change, charge, chart,
cheap, check, chemical,
choose, citizen, claim,
clear, clerk, close,
clothes, collect, collection,
comfortable, common, communication,
company, compare, complain,
complete, concern, condition,
contact, contain, content,
continue, contract, control,
convenient, conversation, copy,
corner, correct, cost,
count, couple, course,
court, cover, crash,
create, credit, cross,
crowd, crowded, customer,
daily, damage, data,
date, deal, decide,
decision, defence, degree,
delay, deliver, demand,
department, depend, deposit,
describe, design, destroy,
detail, develop, dial,
diet, difference, difficulty,
direct, direction, directly,
director, discount, discuss,
disease, disk, display,
distance, district, document,
double, doubt, downtown,
dress, drive, drop,
drug, due, earn,
earthquake, economy, edge,
education, effect, effective,
effort, electricity, employee,
empty, encourage, energy,
enjoy, enter, entrance,
equipment, event, examination,
example, excellent, except,
exciting, excuse, exercise,
exit, expect, expense,
expensive, experience, expert,
explain, express, extra,
face, fail, fair,
fall, fan, fare,
fashion, fault, favor,
favorite, feature, fee,
fence, figure, file,
fill, film, final,
fine, fire, firm,
fit, fix, flag,
flat, flood, floor,
flow, follow, following,
force, foreign, form,
former, forward, found,
foundation, free, freeze,
front, fund, furniture,
further, future, gain,
garage, gas, gather,
general, global, goal,
government, grade, graduagte,
grand, ground, guard,
guess, guide, handle,
hang, happen, hardly,
head, heart, heat,
highly, hire, hold,
host, human, hurt,
illness, image, immediately,
improve, include, income,
increase, individual, industry,
inform, information, insect,
instead, instruction, insurance,
intend, interest, international,
interview, introduce, invitation,
invite, issue, item,
job, join, judge,
knowledge, lack, land,
language, law, lawyer,
lay, lead, lend,
length, level, license,
lie, lift, likely,
limit, limitation, line,
list, load, loan,
local, location, lock,
lose, loss, luck,
lucky, luggage, mail,
main, major, majority,
manage, management, manager,
mark, market, master,
match, material, matter,
meal, means, measure,
media, medicine, mention,
message, method, mind,
minute, miss, mix,
model, modern, moment,
monthly, movemet, nation,
national, nearly, necessary,
notice, offer, office,
officer, official, operate,
operation, operator, opinion,
order, organization, own,
pack, package, pain,
part, party, pass,
passenger, patient, pay,
payment, per, performance,
performance, period, permit,
personal, pick, plain,
plan, plant, plate,
pleasure, plenty, point,
pole, policy, popular,
position, possible, post,
powerful, practice, prefer,
prepare, present, press,
prevent, price, print,
private, probably, problem,
process, produce, product,
production, professional, profit,
program, progress, project,
promise, property, protect,
protection, proud, provide,
public, publish, purpose,
puzzle, quality, quarter,
race, raise, range,
rapid, rate, reach,
ready, realize, reason,
receive, recent, recently,
recommend, record, reduce,
refer, regard, regarding,
regular, relationship, remember,
remove, rent, repair,
report, request, require,
research, reserve, responsible,
rest, result, return,
rise, room, route,
row, run, rush,
safe, safety, sail,
salary, sale, save,
schedule, seat, section,
security, sense, separate,
separately, serious, serve,
service, shake, shape,
share, ship, shock,
short, show, sign,
signal, single, situation,
skill, skin, slip,
social, solve, sort,
sound, spare, spend,
spot, spread, staff,
stage, stair, stand,
standard, state, statement,
step, stock, store,
storm, stretch, strike,
study, subject, submit,
succeed, success, suffer,
suggest, suit, supply,
support, suppose, sure,
surprise, survey, swing,
system, taste, tax,
temperature, terible, term,
tie, tight, tip,
tired, tool, total,
touch, tour, trade,
traffic, training, trip,
trouble, turn, type,
usual, valuable, value,
view, vote, want,
war, warn, way,
wear, weather, win,
wind, wire, wise,
wonder, worth, worthy,
xenophobia, yard, yarn,
yawn, yearn, yell,
yellow, yesterday, yet,
yield, yolk, young,
youth, zeal, zenith,
zigzag, zinc, zoom,
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