/* -*- coding: utf-8 -*-
 *
 * 1367.cc:  No.1367 文字列門松 - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 10;
const char t[] = "kadomatsu";

/* typedef */

/* global variables */

char s[MAX_N + 4];
bool dp[MAX_N + 1][MAX_N + 1];

/* subroutines */

/* main */

int main() {
  scanf("%s", s);
  int sn = strlen(s), tn = strlen(t);

  if (sn > tn) { puts("No"); return 0; }

  dp[0][0] = true;
  for (int i = 0; i <= sn; i++)
    for (int j = 0; j <= tn; j++)
      if (dp[i][j]) {
	if (i < sn && j < tn && s[i] == t[j]) dp[i + 1][j + 1] = true;
	if (i < tn) dp[i][j + 1] = true;
      }

  if (dp[sn][tn]) puts("Yes");
  else puts("No");
  return 0;
}