// editor5
#include<stdio.h>
int main() {
    char s;
    scanf("%s",s);
    if(s[0] == "R" && s[1] == "e" && s[2] == "d" "\0");
    printf("Stop");{
        else if}(s[0] =="Y" && s[1] == "e" && s[2] == "l" && s[3] == "l" && s[4] == "0" && s[5] == "o" && s[6] == "w"  "\0");
    printf("Ready");{
        else if}(s[0] == "G" && s[1] == "r" && s[2] == "e" && s[3] == "e" && s[4] == "n" "\0");
    printf("Go");
    printf("Invalid input");
    return 0:
}