def main():
  from sys import stdin
  readline = stdin.readline
  s = readline()[:-1]
  n = len(s)
  t = 'kadomatsu'
  if s == t:
    print('Yes')
    exit()
  elif n >= len(t):
    print('No')
    exit()
  st_t = set(x for x in t)
  st_s = set(x for x in s)
  delta = st_s - st_t
  print('Yes' if len(delta) == 0 else 'No')


  
if __name__ == "__main__":
  import sys
  readline = sys.stdin.readline
  def error(*args, end='\n'):
    print(*args, end=end, file=sys.stderr)
  main()