#include <iostream>
using namespace std;

int main() {
	int a, b, c;
	cin >> a >> b >> c ;
	if (a == b && b == c && a == c){
		cout << " RWB ";
	}
	else{
		if (a != b && b != c && c != a){
			cout << " RZB ";
		}
		else{
			cout << " RWR ";
		}
		}
	
	return 0;
}