#include <bits/stdc++.h>
#include "testlib.h"
using namespace std;

int main()
{
	registerValidation();
	
	string abc = inf.readToken(format("[0-9]{3, 3}"));
	inf.readEoln();
	inf.readEof();
	
	assert(abc[0] != abc[1]);
	assert(abc[1] != abc[2]);
	assert(abc[2] != abc[0]);
	
	return 0;
}