#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;
}