#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <stdio.h>
#include <queue>
#include <deque>
#include <cstdio>
#include <set>
#include <map>
#include <bitset>
#include <stack>
#include <cctype>
using namespace std;
char c[10] = { 'k','a','d','o','m','a','t','s','u' };
int main() {
	string s;
	cin >> s;
	for (int i = 0; i < (1 << 9); i++) {
		string s1 = "";
		for (int j = 0; j < 9; j++) {
			if (i & (1 << j)) {
				s1 += c[j];
			}
		}
		if(s1 == s) {
			cout << "Yes" << endl;
			return 0;
		}
	}
	cout << "No" << endl;
}