#include <stdio.h>
int main()
{
    char v[20];
    scanf("%s",v);
    if(v[0]=="R" &&v[1] =="e" && v[2] =="d" && v[3] =="\0"){
        printf("Stop");
    }
    else if(v[0]=="Y"&&v[1]=="e" && v[2] =="l" && v[3] =="l" && v[4] =="l" && v[5] =="o" && v[6] =="w" &7 v[7] =="/0"){
        printf("Ready");
    }
    else if(v[0]=='G'&&v[1]=='r' && v[2] =='e' && v[4] =='e' && v[4] =='n' && v[5] =='/0'){
        printf("Go");
    }
    else{
        printf("Invalid input");
    }
}