var used: []bool
var k: []int
func main()
	var n: int :: cui@inputInt()
	do @k :: #[n]int
	for i(0, n - 1)
		do @k[i] :: cui@inputInt()
	end for
	
	do @used :: #[n]bool
	var ans: []int :: f(n)
	if(ans =& null)
		do cui@print("-1\n")
	else
		do cui@print("\{ans[0]} \{ans[1]} \{ans[2]}\n")
	end if
	
	func f(n: int): []int
		if(n < 3)
			ret null
		end if
		for i(0, ^@k - 1)
			if(@used[i])
				skip i
			end if
			for j(i + 1, ^@k - 1)
				if(@used[j])
					skip j
				end if
				for k(j + 1, ^@k - 1)
					if(@used[k])
						skip k
					end if
					
					var flag: bool :: true
					var a: int :: @k[i]
					var b: int :: @k[j]
					var c: int :: @k[k]
					if(a = b | b = c | c = a | (a < b & b < c) | (a > b & b > c))
						do flag :: false
					end if
					if(flag)
						do @used[i] :: true
						do @used[j] :: true
						do @used[k] :: true
						var res: []int :: f(n - 3)
						do @used[i] :: false
						do @used[j] :: false
						do @used[k] :: false
						if(res =& null)
							ret[i, j, k]
						end if
					end if
				end for
			end for
		end for
		ret null
	end func
end func