#include<iostream>
#include<string>
#include<algorithm>

using namespace std;

class animal{
    public:
    virtual void makesound()=0'
};
class lion:public animal{public:void makesound(){cout<<"Roar";}};
class dog:public animal{public:void makesound(){cout<<"Bark";}};
class cow:public animal{public:void makesound(){cout<<"M00";}};

int main(){
    string in;
    cin>>in;
    for(char &c :in)c=tolower(c);
    
    animal* a =nullptr;
    if(in=="lion") a=new lion();
    else if(in=="dog") a= new dog();
    else if(in=="cow") a= new cow();
    else{cout<<"Invalid Input";return 0;}
    
    a->makesound();
    return 0;
    
}