// editor5
#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[4] == "\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");
    {
    printf("Invalid input");
    return 0:
}