#include <iostream>
#include <algorithm>
using namespace std;
int main(){
    string animal;
    cin>>animal;
    transform(animal.begin(),animal.end(),animal.begin(),::tolower);
    if(animal=='lion')
      cout<<"Roar";
    else if(animal=="dog")
      cout<<"Bark";
    else if(animal=="cow")
      cout<<"Moo";
    else
      cout<<"Invalid input";
    return 0;
}