#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) begin(v),end(v)
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
using ll = long long;
using pii = pair<int, int>;
constexpr ll INF = 1ll<<30;
constexpr ll longINF = 1ll<<60;
constexpr ll MOD = 1000000007;
constexpr bool debug = false;
//---------------------------------//

int main() {
	string S;
	cin >> S;
	
	string kadomatsu = "kadomatsu";
	int ans = INF;
	FOR(i, 1, 1 << kadomatsu.size()) {
		string s;
		REP(j, kadomatsu.size()) if (i >> j & 1) s += kadomatsu[j];
		
		if (s == S) {
			puts("Yes");
			return 0;
		}
	}
	
	puts("No");
}