import sys;input = lambda: sys.stdin.readline().rstrip()
#import heapq
#from collections import deque
#import numpy as np
#from collections import Counter as cnt
#from collections import defaultdict as ddc
#from math import factorial as fct
#from math import gcd
#from bisect import bisect_left as bsl
#from bisect import bisect_right as bsr
#from itertools import accumulate as acc
#from itertools import combinations as cmb
#from itertools import permutations as pmt
#from itertools import product as prd
#from functools import reduce as red
#import sys
#sys.setrecursionlimit(10**9)  #再帰を多く使う(デフォルトは1000)

k ='kadomatsu'
Ans = set()
for i in range(2**9):
    ans = ''
    for j in range(9):
        if i>>j&1:
            ans += k[j]
    Ans.add(ans)

s = input()

b = s not in Ans#bが0ならイエス、1ならノー
print('YNeos'[b::2])