属于这两个集合的第一个数字：
78,138,238,246,258,345,357,678,1235,1239,1245,1246,1258,1358,1378,1479,1578,2345,2378,2379,2678,2679,3478,3567,3678,3689,5678,6789,12345,12358,12378,12467,12478,12489,12567,12578,12579,12678,13458,13478,13489,13678,14578,14678,15789,23457,23458,23579,24567,24679,25678,25789,26789,34678,34689,35679,45689,123459,123469,123478,124689,125689,126789,135678,135679,145789,234578,234678,234689,234789,235689,245679,245689,456789,1234569,1234578,1234579,1235678,1235679,1245679,1246789,1256789,1345678,1345679,1345789,1356789,2345678,12345689,12456789,13456789.