require 'prime'

M = gets.to_i
nums = []

if M == 0
  puts 'a'
  exit
end

M.prime_division.each do |e, cnt|
  cnt.times do
    nums << e
  end
end

nums.sort!

values = [1, 1, 1]

nums.each do |x|
  min_v = Float::INFINITY
  idx = -1

  3.times do |i|
    if min_v > values[i]
      min_v = values[i]
      idx = i
    end
  end

  values[idx] *= x
end

puts ['c' * values[0], 'o' * values[1], 'n' * values[2]].join