N = gets.to_i
A = N.times.map { gets.to_i }
counter = Hash.new(0)

A.each do |a|
  counter[a] += 1
end

nums = [*0...N].sort_by { |i| -counter[i] }
ans = Array.new(N, -1)

nums.each do |n|
  ok = false
  N.times do |i|
    next if ans[i] != -1
    next if A[i] == n

    ok = true
    ans[i] = n
    break
  end

  if not ok
    puts -1
    exit
  end
end

puts ans