#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;
}
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