#include <stdio.h>
int main(void) {
// your code goes here
int i=0;
{
}
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CgkvLyB5b3VyIGNvZGUgZ29lcyBoZXJlCglpbnQgaT0wOwoJZm9yKHByaW50Zigib25lXG4iKTtpPDMgJiYgcHJpbnRmKCIiKTtpKyspCgl7CgkJcHJpbnRmKCJoaVxuIik7Cgl9CglyZXR1cm4gMDsKfQo=