#include <cstdio>
using namespace std;
int main(){
	FILE *fp = fopen(__FILE__, "r");
	if(!fp){ volatile bool x = true; while(x); }
	for(int i = 0; !feof(fp); ++i){
		int a = fgetc(fp);
		int b = getchar();
		if(a != b){
			printf("%d\n\"%c\"\n\"%c\"\n", i, a, b);
			break;
		}
	}
}