N=gets.to_i
Ks=gets.chomp.split.map(&:to_i)
$memo = []
$ans = -1

def rec j
  return if $memo[j] != nil
  $memo[j] = false
  ns = []
  (0...N).each{|i|
    if (j & (1 << i)) == 0
      ns << i
    end
  }
  for cs in ns.combination(3)
    ok=false
    if Ks[cs[0]] < Ks[cs[1]] and Ks[cs[1]] > Ks[cs[2]]
      ok=true
    end
    if Ks[cs[0]] > Ks[cs[1]] and Ks[cs[1]] < Ks[cs[2]]
      ok=true
    end
    if ok
      j2 = j | (1<<cs[0]) | (1<<cs[1]) | (1<<cs[2])
      rec j2
      if $memo[j2] == false
        $memo[j] = true
        $ans = cs.join(' ') if (j==0) and ($ans == -1)
      end
    end
  end
end

rec 0
# (0..10000).each{|i|
#   if $memo[i] != nil
#     puts "#{i}: #{$memo[i]}"
#   end
# }
puts $ans