s = input()
t = 'kadomatsu'
if len(s) > len(t):
  print('No')
  exit()

indx = -1
for i in range(len(s)):
  if s[i] not in t:
    print('No')
    exit()
  for j in range(indx+1, len(t)):
    if s[i] == t[j]:
      indx = i 
      break
  else:
    ans = print('No')
    exit()
print('Yes')