#include <stdio.h>
int main(void) {
int a, b;
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CglpbnQgYSwgYjsKCXByaW50ZigiSGF5IG5oYXAgYSwgYjogXG4iKTsKCXNjYW5mKCIlZCAlZCIsICZhLCAmYik7CglwcmludGYoIiU4ZFxuIiwgYSk7CglwcmludGYoIitcbiIpOwpwcmludGYoIiU4ZFxuIiwgYik7CnByaW50ZigiLS0tLS0tLS0tLVxuIik7CnByaW50ZigiPSAlN2RcbiIsIGEgKyBiKTsKCXJldHVybiAwOwp9Cg==