#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[5]  =='\0'){
       printf("Go");
   }
   else{
       printf("Invalid input");
       return 0;
   }