import pypyjit
pypyjit.set_param("max_unroll_recursion=-1")
from collections import *
from functools import *
from itertools import *
from heapq import *
import sys, math
# sys.setrecursionlimit(10**4)
input = sys.stdin.readline



S = list(input())[:-1]
X = list('kadomatsu')
M = len(S)
N = len(X)
now = 0
for x in X:
    if x==S[now]:
        now += 1
    if now==M:
        print('Yes')
        exit()
print('No')
# print(now)