def is_kadomatsu(a, b, c):
    if a == c:
        return False
    if (a - b) * (c - b) <= 0:
        return False
    return True

def can_win(a, kl):
    for k in kl:
        if a & set(k):
            continue
        if can_win(a | set(k), kl):
            return False
    return True

N = int(input())
K = list(map(int, input().split()))
kl = [((i, j, k)) for i in range(N-2) for j in range(i+1, N-1) for k in range(j+1, N) if is_kadomatsu(K[i], K[j], K[k])]
ans = None
for k in kl:
    if can_win(set(k), kl):
        ans = k
        break
if ans:
    print(' '.join(map(str, ans)))
else:
    print(-1)