#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] == 'o' && v[5] == 'w' && v[6] == '/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");
    }
}