#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "light.h"



TrafficLight next_light(TrafficLight current) {
    // TODO: implement this function
    return current;
}


int main(void) {
    const char *names[] = {"RED", "GREEN", "YELLOW"};
    int start, steps;
    if (scanf("%d %d", &start, &steps) != 2) { return 0; }
    TrafficLight light = (TrafficLight) start;
    for (int i = 0; i < steps; i++) { light = next_light(light); }
    printf("%s\n", names[light]);
    return 0;
}