#include <stdio.h>
int main()
{
    char S[10];
    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;
}