属于这两个集合的第一个数字：
121,161,171,242,323,343,363,484,505,515,525,535,565,575,595,676,707,737,767,939,949,959,979,989,1313,1919,2323,2525,2929,3131,3535,3737,4141,4343,4747,4949,5353,5959,6161,6565,6767,7171,7373,7979,8383,8989,9797,12121,13131,14141,15151,19191,31313,34343,37373,38383,39393,51515,52525,57575,58585,69696,71717,73737,75757,79797,91919,92929,96969,97979,98989,1010101,1313131,1414141,1515151,1717171,1818181,1919191,3636363,3838383,5050505,5252525,5656565,5757575,5858585,7070707,7171717,7373737,7474747,7575757,7676767,7878787,7979797,9494949,9797979.