#include<iostream>
#include<algorithm>
#include<iomanip>
#include<cmath>
#include<string>
using namespace std;
string a,b;  
int main(){
    cin>>a;
	long long l,sum=0; 
    for(int i=0;i<a.length();i++){
    	if(a[i]=='X'&&a[i+1]=='D'
		||a[i]=='D'&&a[i+1]=='X'){
			cout<<"Yes";
		}
		else if(a[i]==a[i+1]&&
		a[i+1]==a[i+2]&&a[i+2]==a[i+3]){
			cout<<"Yes";
		}else{
			cout<<"No";
		}
	}
	return 0;
}