b21 := (1,479,1341)(2,87,1073)(3,484,1363)(4,1146,84)(5,497,1343)(6,442,1076) (7,1141,101)(8,492,1344)(9,447,99)(10,16,20)(11,477,1340)(12,1137,632) (13,117,627)(14,488,1357)(15,228,92)(17,119,623)(18,677,380)(19,1129,80) (21,664,372)(22,1151,161)(23,727,156)(24,745,1349)(25,744,159)(26,737, 162)(27,725,154)(28,733,634)(29,729,152)(30,724,155)(31,723,378)(32,705, 62)(33,645,457)(34,1710,1345)(35,1703,1079)(36,1705,106)(37,1714,381)(38, 1694,103)(39,1715,163)(40,935,170)(41,934,168)(42,942,635)(43,937,166) (44,953,174)(45,1142,183)(46,493,1350)(47,260,1081)(48,448,182)(49,251, 181)(50,254,177)(51,739,186)(52,654,468)(53,436,439)(54,226,443)(55,642, 473)(56,932,446)(57,1132,708)(58,480,1359)(59,89,1095)(60,229,709)(61, 120,722)(63,1699,710)(64,256,712)(65,1662,586)(66,1661,584)(67,1680,598) (68,1653,782)(69,1640,784)(70,1625,777)(71,1647,796)(72,1729,785)(73, 1651,788)(74,1629,800)(75,1128,1135)(76,474,1364)(77,435,1134)(78,224, 1136)(79,115,1149)(81,663,1144)(82,640,1147)(83,249,1140)(85,1090,1338) (86,1078,1072)(88,1096,153)(90,1093,458)(91,1084,179)(93,476,1351)(94, 116,637)(95,706,230)(96,1697,231)(97,933,234)(98,250,235)(100,1660,594) (102,121,1713)(104,1665,1712)(105,1075,1696)(107,1541,1760)(108,1529, 1757)(109,1532,1751)(110,1547,1745)(111,1546,1747)(112,1727,1738)(113, 1536,1742)(114,1523,1758)(118,684,371)(122,1679,585)(123,622,1130)(124, 625,227)(125,1545,1731)(126,569,636)(127,559,203)(128,721,207)(129,1711, 208)(130,952,210)(131,563,713)(132,1645,790)(133,561,237)(134,886,1092) (135,888,639)(136,882,517)(137,906,523)(138,904,534)(139,1100,519)(140, 1549,1749)(141,903,521)(142,901,528)(143,845,341)(144,837,638)(145,831, 338)(146,851,346)(147,850,342)(148,956,347)(149,829,454)(150,828,1143) (151,909,532)(157,938,734)(158,255,735)(160,1663,746)(164,628,726)(165, 562,736)(167,481,1362)(169,666,949)(171,646,951)(172,1701,941)(173,257, 944)(175,1631,954)(176,1526,1754)(178,482,1352)(180,438,258)(184,1527, 1743)(185,630,252)(187,1335,1196)(188,1325,1193)(189,1308,1187)(190,1306, 1189)(191,1329,1194)(192,1332,1198)(193,1320,1199)(194,1656,1209)(195, 1311,1722)(196,1553,1759)(197,1327,1188)(198,1310,1208)(199,1312,1212) (200,1313,1200)(201,444,564)(202,232,567)(204,671,578)(205,711,565)(206, 261,570)(209,838,576)(211,213,214)(215,714,218)(216,653,469)(217,946,222) (219,1639,791)(220,571,223)(221,892,529)(225,485,1339)(233,836,339)(236, 1316,1186)(238,602,1558)(239,608,1585)(240,609,1577)(241,604,1579)(242, 1678,1576)(243,1646,1580)(244,605,1728)(245,1544,1763)(246,849,1570)(247, 606,1584)(248,610,1575)(253,675,377)(259,1637,781)(262,613,1561)(263,306, 1462)(264,312,1489)(265,452,1468)(266,317,1470)(267,307,1459)(268,679, 1480)(269,743,1472)(270,1707,1471)(271,947,1473)(272,1087,1460)(273,574, 1475)(274,316,1467)(275,450,280)(277,741,284)(278,656,470)(279,288,285) (281,1673,596)(282,1537,1744)(283,573,286)(289,804,323)(290,824,1353) (291,823,326)(292,817,328)(293,1716,329)(294,955,332)(295,802,453)(296, 1648,794)(297,1098,320)(298,803,333)(299,826,322)(300,806,948)(301,807, 335)(302,1331,1203)(303,812,575)(304,819,1478)(305,1469,1085)(308,1461, 449)(309,1464,716)(310,1693,595)(311,1658,792)(313,1466,1706)(314,1484, 349)(315,1463,740)(318,1483,1568)(319,494,1360)(321,451,808)(324,742,815) (325,717,809)(327,1086,801)(330,894,825)(331,841,820)(334,616,1581)(336, 1477,818)(337,1139,835)(340,672,843)(343,1669,848)(344,633,830)(345,890, 846)(348,1317,1210)(350,814,842)(351,1285,1402)(352,1281,1420)(353,1295, 1414)(354,1298,1405)(355,1297,1399)(356,1724,1403)(357,1287,1406)(358, 1277,1416)(359,1279,1421)(360,1689,1418)(361,1275,1426)(362,1278,1409) (363,1552,1761)(364,1293,1408)(365,1300,1413)(366,1282,1417)(367,1294, 1588)(368,1283,1398)(369,1289,1410)(370,1131,668)(373,728,673)(374,644, 681)(375,1698,669)(376,936,674)(379,1628,798)(382,1525,1752)(383,626,665) (384,1309,1207)(385,603,1578)(386,1035,1458)(387,1034,1431)(388,1015, 1428)(389,1039,1446)(390,1040,1436)(391,1028,1437)(392,1013,1445)(393, 1017,1452)(394,1684,1449)(395,1014,1440)(396,1038,1438)(397,1026,1439) (398,1029,1441)(399,1016,1451)(400,1518,1050)(401,1504,1052)(402,1497, 1042)(403,1513,1063)(404,1726,1053)(405,1515,1055)(406,1494,1062)(407, 1659,1069)(408,1492,1153)(409,1495,1057)(410,1498,1720)(411,1556,1756) (412,1503,1056)(413,1505,1488)(414,1522,1058)(415,1496,1066)(416,751, 1371)(417,769,1395)(418,759,1390)(419,764,1375)(420,750,1370)(421,760, 1384)(422,752,1368)(423,754,1385)(424,748,1391)(425,1097,1369)(426,755, 1725)(427,773,1377)(428,907,1383)(429,753,1386)(430,763,1378)(431,774, 1587)(432,762,1374)(433,765,1491)(434,761,1387)(437,647,459)(440,1666, 583)(441,1632,776)(445,884,520)(455,1499,1044)(456,1133,648)(460,730,651) (461,1700,649)(462,1664,662)(463,1630,797)(464,1074,641)(465,629,643) (466,883,661)(467,832,658)(471,805,657)(472,1465,655)(475,1356,1337)(478, 1346,624)(483,1690,582)(486,1342,1695)(487,1554,1730)(489,1361,518)(490, 1366,1185)(491,1347,560)(495,1365,1396)(496,1519,1043)(498,1618,545)(499, 1592,540)(500,1607,542)(501,1591,538)(502,1613,548)(503,1612,543)(504, 1615,549)(505,1590,557)(506,1614,553)(507,1594,551)(508,1619,1205)(509, 1611,1574)(510,1599,541)(511,1603,1482)(512,1598,847)(513,1593,683)(514, 1617,1448)(515,1623,1065)(516,1138,885)(522,943,891)(524,1668,902)(525, 1635,908)(526,889,899)(527,839,896)(530,611,1582)(531,813,895)(533,1022, 1454)(535,1348,881)(536,1597,900)(537,1148,1595)(539,682,1604)(544,1677, 1610)(546,1091,1589)(547,581,1600)(550,619,1624)(552,1481,1602)(554,1292, 1621)(555,1036,1622)(556,770,1620)(558,1608,1609)(566,1672,591)(568,1534, 1740)(572,614,1564)(577,1284,1404)(579,1025,1433)(580,1502,1054)(587,731, 1670)(588,1702,1667)(589,939,1671)(590,1528,1764)(592,833,1675)(593,1314, 1687)(597,810,1674)(599,1018,1692)(600,757,1691)(601,1562,1083)(607,1560, 715)(612,1559,738)(615,1569,1476)(617,1566,840)(618,1557,678)(620,1565, 893)(621,1573,1601)(631,1627,786)(650,1540,1734)(652,1326,1191)(659,1510, 1047)(660,768,1373)(667,1644,778)(670,1538,1732)(676,1324,1190)(680,1506, 1045)(685,961,913)(686,963,911)(687,980,925)(688,1718,918)(689,964,930) (690,1683,928)(691,965,1717)(692,979,914)(693,982,922)(694,966,958)(695, 1333,1211)(696,970,912)(697,978,1583)(698,973,1486)(699,971,931)(700,962, 929)(701,1041,1455)(702,981,1388)(703,1616,927)(704,967,1682)(707,1633, 779)(718,1280,1397)(719,1500,1046)(720,756,1372)(732,1533,1733)(747,972, 915)(749,1381,1355)(758,1367,1145)(766,1394,1415)(767,1520,1061)(771, 1376,898)(772,1382,1606)(775,1389,924)(780,940,1636)(783,1077,1626)(787, 834,1642)(789,1315,1654)(793,811,1641)(795,1019,1657)(799,968,1650)(816, 1322,1201)(821,1290,1411)(822,1030,1442)(827,974,921)(844,1031,1435)(852, 1158,986)(853,1178,991)(854,1166,1009)(855,1159,983)(856,1182,1004)(857, 1155,985)(858,1183,996)(859,1181,1006)(860,1686,1008)(861,1154,1152)(862, 1161,1719)(863,1180,997)(864,1160,1010)(865,1162,1000)(866,1167,1007) (867,1171,998)(868,1164,984)(869,1174,1487)(870,1173,1001)(871,1302,1423) (872,1168,1011)(873,1586,999)(874,1157,994)(875,1179,989)(876,1163,988) (877,1169,987)(878,1392,1005)(879,1175,1002)(880,1176,995)(887,1542,1741) (897,1037,1434)(905,976,919)(910,1150,969)(916,1681,977)(917,1094,960) (920,1328,1213)(923,1296,1422)(926,1358,959)(945,1318,1192)(950,1023, 1430)(957,1170,990)(975,1514,1067)(992,1649,1184)(993,1099,1156)(1003, 1485,1172)(1012,1447,1354)(1020,1429,1708)(1021,1555,1746)(1024,1457, 1204)(1027,1450,1572)(1032,1521,1059)(1033,1453,1379)(1048,1709,1501) (1049,1676,1512)(1051,1089,1493)(1060,1508,1517)(1064,1605,1511)(1068, 1380,1509)(1070,1177,1516)(1071,1444,1507)(1080,1524,1737)(1082,1307, 1197)(1088,1276,1401)(1101,1791,1222)(1102,1786,1228)(1103,1784,1234) (1104,1799,1235)(1105,1790,1214)(1106,1767,1723)(1107,1771,1216)(1108, 1777,1490)(1109,1775,1231)(1110,1776,1238)(1111,1773,1239)(1112,1766, 1236)(1113,1797,1244)(1114,1768,1215)(1115,1774,1225)(1116,1770,1688) (1117,1798,1230)(1118,1765,1224)(1119,1781,1218)(1120,1789,1240)(1121, 1769,1217)(1122,1795,1233)(1123,1778,1227)(1124,1792,1242)(1125,1782, 1226)(1126,1785,1241)(1127,1788,1237)(1165,1550,1753)(1195,1638,1330) (1202,1474,1321)(1206,1567,1319)(1219,1721,1772)(1220,1685,1783)(1221, 1652,1787)(1223,1551,1800)(1229,1334,1793)(1232,1301,1796)(1243,1456, 1780)(1245,1272,1253)(1246,1254,1270)(1248,1265,1251)(1249,1263,1262) (1250,1258,1255)(1252,1655,1267)(1256,1336,1273)(1260,1305,1427)(1261, 1266,1393)(1264,1269,1268)(1271,1794,1274)(1286,1419,1571)(1288,1412, 1479)(1291,1424,1443)(1299,1400,1643)(1303,1407,1323)(1304,1425,1779) (1432,1539,1755)(1530,1735,1704)(1531,1762,1739)(1535,1750,1563)(1543, 1748,1596)(1548,1736,1634);