$a1998, số 1101,1108,1115,1122,1129,1143,1150,1157,1164,1168,1171,1178,1185,1192,1199,1206,1213,1219,1226,1233,1240,1247,1254,1261,1268,1275,1282,1289,1296,1303,1310,1317,1324,1331,1344,1351,1358,1365,1372,1379,1386,1393,1400,1407,1414,1421,1419,1428,1435,1442,1449,1456
Bài trích 