// No334.cpp : Defines the entry point for the console application.
//

#include <assert.h>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <climits>
using namespace std;
typedef unsigned char uchar;
typedef unsigned int uint;
typedef long long ll;
typedef unsigned long long ull;

#define kArraySize 12
int K[kArraySize];
int N = 0;

bool kado(int a, int b, int c) {
	if (a == b || b == c || a == c)
		return false;
	return (b < a && b < c) || (b > a && b > c);
}

bool recurse(int count) {
	//bool turnD = (count % 2)==0;
	bool noKado = true;
	bool win = false;
	for (int k1 = 0; k1 < N - 2; k1++) {
		if (K[k1] == 0) {
			continue;
		}
		for (int k2 = k1 + 1; k2 < N - 1; k2++) {
			if (K[k2] == 0) {
				continue;
			}
			for (int k3 = k2 + 1; k3 < N; k3++) {
				if (K[k3] == 0) {
					continue;
				}
				if (kado(K[k1], K[k2], K[k3]))
				{
					noKado = false;
					//printf("%d,%d,%d\n", k1, k2, k3);
					auto bk1 = K[k1];
					auto bk2 = K[k2];
					auto bk3 = K[k3];
					K[k1] = K[k2] = K[k3] = 0;
					auto result = recurse(count + 1);

					K[k1] = bk1;
					K[k2] = bk2;
					K[k3] = bk3;

					if (!result) {
						win = true;
					}
				}
			}
		}
	}
	return noKado ? false : win;
}

int main()
{
	cin >> N;

	for (int i = 0; i < N; i++) {
		scanf("%d", &K[i]);
	}

	bool found = false;
	int ik[3];

	for (int k1 = 0; k1 < N - 2; k1++) { 
		for (int k2 = k1 + 1; k2 < N - 1; k2++) {
			for (int k3 = k2 + 1; k3 < N; k3++) {
				if (kado(K[k1], K[k2], K[k3]))
				{
					//printf("%d,%d,%d\n", k1, k2, k3);
					auto bk1 = K[k1];
					auto bk2 = K[k2];
					auto bk3 = K[k3];
					K[k1] = K[k2] = K[k3] = 0;
					if(!recurse(1)) {
						ik[0] = k1;
						ik[1] = k2;
						ik[2] = k3;
						//printf("%d : %d,%d,%d\n", count, k1, k2, k3);
						printf("%d %d %d\n", ik[0], ik[1], ik[2]);
						goto _ExitLoop;
					}
					K[k1] = bk1;
					K[k2] = bk2;
					K[k3] = bk3;
				}
			}
		}
	}

	cout << -1 << endl;

_ExitLoop:

	return 0;
}