#include<bits/stdc++.h>
using namespace std;
char c[3];
int main(){
    for(int i=1;i<=3;i++) cin>>c[i];
    for(int i=1;i<=3;i++){
        if(c[i]=='M'&&c[i-1]=='R'){
            cout<<"Yes"<<endl;
            return 0;
        }
        else if(c[i]=='M'&&c[i-2]=='R'){
            cout<<"Yes"<<endl;
            return 0;
        }
    }
    cout<<"No"<<endl;
    return 0;
}