#include <iostream>
using namespace std;

int main() {
	int a, b, c, x;
	cin >> a >> b >> c >> x;
	if (a == x) {
		cout << "Clientul 1";
	} else if (b == x) {
		cout << "Clientul 2";
	} else if (c == x){
		cout << "Clientul 3";
	}
	return 0;
}