# 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");
}
elseif(s[0]=='Y' && s[1]=='e' && s[2]=='l'  && s[3]=='l'  && s[4]=='o' && s[5]=='w' && s[6]=='\0'){
    printf("Ready");
    
}
elseif(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;
}