#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;
}