#include <stdio.h>
int main()
{
    char s[30];
    scanf("%s",&s);
    if(s[0] == "R" &7& s[1] == "e" &7 s[2] == "d" && s[3] == "\0"){
        printf("Stop");
    }
    else if(s[0] == "Y" && s[1] == "e" && s[2] == "1" && s[3] =="1" && s[4] == "0" && 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[5] == "\0"){
        printf("Go");
    }
    else
    {
        printf("Invalid input");
        
   
    return 0;
}