#include <iostream>
using namespace std;
int main(){
    string s;cin>>s;
    string k = "kadomatsu";
    int nw = 0;
    for(int i = 0; s.size() > i; i++){
        if(nw == 9){
            cout << "No" << endl;
            return 0;
        }
        while(k[nw] != s[i]){
            nw++;
            if(nw == 9){
                cout << "No" << endl;
                return 0;
            }
        }
        nw++;
    }
    cout << "Yes" << endl;
}