s = gets.chomp
want = 'kyoprotenkei90'.chars.group_by(&:itself).map {|k, v| [k, v.length]}.to_h

s.chars.each do |c|
  if want.has_key?(c)
    want[c] -= 1;
    want.delete(c) if want[c] == 0
  else
    puts 'No'
    exit
  end
end
if want.empty?
  puts 'Yes'
else
  puts 'No'
end