#include <stdio.h>
int main(void) {
// your code goes here
char ch1,ch2;
scanf("%c %c",&ch1
,&ch2
); return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CgkvLyB5b3VyIGNvZGUgZ29lcyBoZXJlCgljaGFyIGNoMSxjaDI7CiAgICBzY2FuZigiJWMgJWMiLCZjaDEsJmNoMik7CiAgICBwcmludGYoImNoMei/meS4quWtl+espuaYr++8miVjXG4iLGNoMSk7CiAgICBwcmludGYoImNoMui/meS4quWtl+espuaYr++8miVjXG4iLGNoMik7CglyZXR1cm4gMDsKfQo=