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

int main(){
    char signal(20);
    scanf("%s",single);
    
    if (strcmp(single,"Red")==0) {
    printf("Ready");
    }
    else if(strcmp(single,"Yellow")==0){
        printf("Ready");
    }
    else if(strcmp(single,"green")==0){
        printf("Go");
    }
    else{
        printf("Invaild input");
    }
    return 0;
}