a = io.read()
b = "kyoprotenkei90"
at, bt = {}, {}
for i = 1, 14 do
  at[i] = a:byte(i)
  bt[i] = b:byte(i)
end
table.sort(at)
table.sort(bt)
for i = 1, 14 do
  if at[i] ~= bt[i] then print("No") os.exit() end
end
print("Yes")