#include <stdio.h>
int main(){
    char s[20];
    scanf("%s",&s);
    
    if(s[0] =="R" && s[1] == "e" && s[2]== "d" && s[3] == "/0"){
        printf("Stop");
    }
    else if(s[0] == "Y" && s[1] == "e" && s[2] == "l" && s[3] == "l" && s[4] == "o" && s[5] == "w" && s[6] == "/0"){
        printf("Ready");
    }
    else if(s[0] == "G" && s[1] == "r" && s[2] == "e" && s[3] == "e" && s[4] == "n" && s[4] == "/0"){
        printf("Go");
    }
    else{
        printf("Invalid input");
    }
}