属于这两个集合的第一个数字：
262,292,474,626,818,848,898,1212,2828,3636,5252,6060,6262,7272,8080,9292,9898,23232,25252,40404,63636,67676,69696,82828,85858,86868,161616,242424,262626,363636,424242,464646,484848,565656,646464,686868,707070,767676,828282,848484,929292,949494,969696.