#include <bits/stdc++.h>

#define MOD 1000000007
#define INF (1<<30)
#define INFL (1<<62)
#define pe(str) return cout<<(str)<<endl,0
#define px(str) cout<<(str)<<endl,exit(0)
#define accu(ac,v) cout<<setprecision(ac)<<v<<endl
#define bpc(a) __builtin_popcount(a)
#define pr(str) cout<<(str)<<endl
#define prpr(str) cout<<str<<endl
#define db(str) cerr<<"debug:"<<(str)<<endl
#define dbdb(str) cerr<<"debugs:"<<str<<endl
#define re(i,n) for(int i=0;i<(n);i++)
#define rre(i,n) for(int i=(n);i>=0;i--)
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define rrep(i,a,b) for(int i=(b);i>=(a);i--)
#define bw(a,b,c) (((a)<=(b))&&((b)<=(c)))
#define hello cout<<"hello"<<endl
#define spre(a) setprecision(a)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
#define IF(C,T,F) ((C)?(T):(F))
#define max3(a,b,c) max((a),max((b),(c)))
#define min3(a,b,c) min((a),min((b),(c)))
#define max4(a,b,c,d) max((a),max((b),max((c),(d))))
#define min4(a,b,c,d) min((a),min((b),min((c),(d))))
#define enl cout<<endl
#define declare(t,n) t n;cin>>n
#define EPS 1e-6
#define EPSIN(a,b) ((b)-EPS<=(a)&&(a)<=(b)+EPS)

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int,int> pii;
typedef complex<int> point;

template<class InputIterator>
void dump(InputIterator first,InputIterator last,char delim=' '){
	for(InputIterator it=first;it!=last;it++){
		if(it!=first)cout<<delim;
		cout<<*it;
	}
}

ull p(ull x,ull y){
	if(y==0) return 1;
	ull A=p(x,y/2)%MOD;
	return (y&1?((A*A)%MOD*x)%MOD: (A*A)%MOD);
	// return (y&1?((A*A)*x):(A*A));
}

template<class T>
void swp(T &a,T &b){
	T t=a; a=b; b=t;
}

int n;
int a[12];
bool u[12];
bool solve(int i,int j,int k){
	if(u[i]||u[j]||u[k])return false;
	if(!(a[i]!=a[j]&&a[j]!=a[k]&&a[k]!=a[i]&&(a[i]<a[j]&&a[k]<a[j]||a[i]>a[j]&&a[k]>a[j])))return false;
	u[i]=u[j]=u[k]=1;
	re(x,n){
		if(u[x])continue;
		rep(y,x+1,n){
			if(u[y])continue;
			rep(z,y+1,n){
				if(u[z])continue;
				if(solve(x,y,z)){
					u[i]=u[j]=u[k]=0;
					return false;
				}
			}
		}
	}
	u[i]=u[j]=u[k]=0;
	return true;
}
int main(void){
	cin>>n;
	re(i,n)cin>>a[i];
	re(i,n)u[i]=0;
	re(i,n){
		if(u[i])continue;
		rep(j,i+1,n){
			if(u[j])continue;
			rep(k,j+1,n){
				if(u[k])continue;
				if(solve(i,j,k))return cout<<i<<" "<<j<<" "<<k<<endl,0;
			}
		}
	}
	pe(-1);

	return 0;
}