#include <iostream>
#include <vector>
using namespace std;
int checkbin(long long s){
	int js = 0;
	while(s){
		js += (s & 1);
		s = s>> 1;
	}
	return js;
}
int main(){
	int n;
	cin >> n;
	vector<long long> s(n);
	for(int i = 0; i < n; i++){
		int a, b;
		cin >> a >> b;
		s[i] = ( 1 << (a - 1) ) + (b - 1);
	}
	for(int i = 0; i < n; i++){
		if(checkbin(s[i]) % 2 == 0)	cout << "BLACK" << endl;
		else cout << "RED" << endl; 
	}
	return 0;
}