属于这两组的第一个数字：
12,54,56,78,210,234,432,456,654,678,876,1212,1232,3210,3234,3432,3456,5432,5454,5456,5656,5676,7656,7878,9876,21012,21210,21234,23212,23232,23454,43212,43232,43434,43456,45432,45456,45654,45656,45678,65454,65676,67656,67676,67878,76545,87654,87678,87876,89898,101010,101232,121210,121212,123210,123234,123432,123456,321012,321210,321232,321234,323232,323454,323456,343212,343232,343434,345432,345456,345654,345678,454545,543210,543234,543432,543456,545454,545676,565432,565434,565656,567654,567678,567876,656565,765432,765456,765654,765678,767676,767898,787656,787878,789876,987654,987678,987876,989898.