#include <bits/stdc++.h>
    using namespace std;
    #include <math.h>
    #include <iomanip>
    #include <cstdint>
    #include <string>
    #include <sstream>
    template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
    template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
    #define rep(i,n) for (int i = 0; i < (n); ++i)
    typedef long long ll;
    using P = pair<ll,ll>;
    const int mod=998244353;
    const int INF=1001001001;

    int main() {
      string s;
      cin>>s;
      if(regex_match(s,regex("k?a?d?o?m?a?t?s?u?"))){cout<<"Yes"<<endl;}
      else{cout<<"No"<<endl;}
      return 0;
    }