#include<bits/stdc++.h>
#define Add(x,y) (x+y>=mod)?(x+y-mod):(x+y)
#define lowbit(x) x&(-x)
#define pi pair<ll,ll>
#define pii pair<ll,pair<ll,ll>>
#define iip pair<pair<ll,ll>,ll>
#define ppii pair<pair<ll,ll>,pair<ll,ll>>
#define fi first
#define se second
#define full(l,r,x) for(auto it=l;it!=r;it++) (*it)=x
#define Full(a) memset(a,0,sizeof(a))
#define open(s1,s2) freopen(s1,"r",stdin),freopen(s2,"w",stdout);
#define For(i,l,r) for(register int i=l;i<=r;i++)
#define _For(i,l,r) for(register int i=r;i>=l;i--)
using namespace std;
typedef double db;
typedef unsigned long long ull;
typedef long long ll;
bool Begin;
const ll N=13,M=N*N*N;
inline ll read(){
    ll x=0,f=1;
    char c=getchar();
    while(c<'0'||c>'9'){
        if(c=='-')
          f=-1;
        c=getchar();
    }
    while(c>='0'&&c<='9'){
        x=(x<<1)+(x<<3)+(c^48);
        c=getchar();
    }
    return x*f;
}
inline void write(ll x){
	if(x<0){
		putchar('-');
		x=-x;
	}
	if(x>9)
	  write(x/10);
	putchar(x%10+'0');
}
struct Node{
	ll x,y,z;
	bool operator<(const Node&rhs)const{
		if(x^rhs.x)
		  return x<rhs.x;
		if(y^rhs.y)
		  return y<rhs.y;
		return z<rhs.z;
	} 
};
ll n,cnt;
ll a[N],x[M],y[M],z[M];
vector<Node> ans;
bool f[N];
bool dfs(){
	bool F=0,H=0;
	For(i,1,cnt){
		if(f[x[i]]||f[y[i]]||f[z[i]])
		  continue;
		F=1;
		f[x[i]]=f[y[i]]=f[z[i]]=1;
		if(!dfs())
		  H=1;
		f[x[i]]=f[y[i]]=f[z[i]]=0;
	}
	if(!F)
	  return 0;
	return H;
}
bool End;
int main(){
	n=read();
	For(i,1,n)
	  a[i]=read();
	For(i,1,n){
		For(j,i+1,n){
			For(k,j+1,n){
				if(a[i]==a[j]||a[j]==a[k]||a[i]==a[k])
				  continue;
				if(max({a[i],a[j],a[k]})==a[j]||min({a[i],a[j],a[k]})==a[j]){
					++cnt;
					x[cnt]=i;
					y[cnt]=j;
					z[cnt]=k;
				}
			}
		}
	}
	For(i,1,cnt){
		f[x[i]]=f[y[i]]=f[z[i]]=1;
		if(!dfs())
		  ans.push_back({x[i],y[i],z[i]});
		f[x[i]]=f[y[i]]=f[z[i]]=0;
	}
	if(!ans.size()){
		puts("-1");
		exit(0);
	}
	sort(ans.begin(),ans.end());
	write(ans[0].x-1);
	putchar(' ');
	write(ans[0].y-1);
	putchar(' ');
	write(ans[0].z-1);
	putchar(' ');	
	cerr<<'\n'<<abs(&Begin-&End)/1048576<<"MB";
	return 0;
}