import java.io.*;
import java.util.*;
public class taskAedu93 {
    static class FastReader 
    { 
        BufferedReader br; 
        StringTokenizer st; 
  
        public FastReader() 
        { 
            br = new BufferedReader(new
                     InputStreamReader(System.in)); 
        } 
  
        String next() 
        { 
            while (st == null || !st.hasMoreElements()) 
            { 
                try
                { 
                    st = new StringTokenizer(br.readLine()); 
                } 
                catch (IOException  e) 
                { 
                    e.printStackTrace(); 
                } 
            } 
            return st.nextToken(); 
        } 
  
        int nextInt() 
        { 
            return Integer.parseInt(next()); 
        } 
  
        long nextLong() 
        { 
            return Long.parseLong(next()); 
        } 
  
        double nextDouble() 
        { 
            return Double.parseDouble(next()); 
        } 
  
        String nextLine() 
        { 
            String str = ""; 
            try
            { 
                str = br.readLine(); 
            } 
            catch (IOException e) 
            { 
                e.printStackTrace(); 
            } 
            return str; 
        } 
    } 
     public static void main(String[] args) {
        FastReader fr = new FastReader();
        int t  = fr.nextInt();

        while(t-- > 0){
            solve(fr);
        }
    }

    static void solve(FastReader fr){
        int n = fr.nextInt();
        long[] arr = new long[n];
        for(int i = 0 ; i < n ; i++) arr[i] = fr.nextLong();
        if(arr[0] + arr[1] > arr[n - 1]) System.out.println(-1);
        else{
            System.out.println(0 + " " + 1 + " " + (n - 1)); 
        } 
    }
}