#include <stdio.h>
#include <string.h>
int main()
{
char a[50],b[50];
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CiNpbmNsdWRlIDxzdHJpbmcuaD4KaW50IG1haW4oKQp7CgljaGFyIGFbNTBdLGJbNTBdOwoJZ2V0cyhhKTsKCXByaW50ZigiJWxkXG4iLHN0cmxlbihhKSk7CglzdHJjcHkoYixhKTsKCXByaW50ZigiJXNcbiIsYik7CglzdHJjYXQoYSxiKTsKCXByaW50ZigiJXMiLGEpOwoJcmV0dXJuIDA7CgkKCQogfSA=