S=input()
r='kadomatsu'
import itertools
A=list(itertools.product([0,1], repeat=9))
D=[]
for i in A:
  s=''
  for j in range(9):
    if i[j]==1:
      s=s+r[j]
  D.append(s)
if S in D:
  print('Yes')
else:
  print('No')