属于这两组的第一个数字:
212,424,515,636,848,1212,1515,2424,3636,4848,13131,17171,21212,23232,26262,27272,39393,42424,46464,51515,53535,57575,63636,69696,84848,121212,131313,151515,161616,171717,242424,262626,313131,323232,353535,363636,373737,393939,484848,626262,646464,717171,727272,737373,757575,767676,939393,969696,2121212,3131313,4242424,5151515,6161616,6262626,6363636,7171717,8484848,9393939,12121212,15151515,24242424,36363636,48484848,212121212,424242424.