import java.beans.FeatureDescriptor;
import java.util.*;

public class Solution6 {
	
	
	
	public static void main(String[] args) {
	
		Scanner sc=new Scanner(System.in);
		
		int t=sc.nextInt();
		while(t--!=0) {
		
			int n=sc.nextInt();
			int flag=0;
			
			int arr[]=new int[n];
			
			for(int i=0;i<n;i++) {
				arr[i]=sc.nextInt();
			}
			
			for(int i=0;i<n-2;i++) {
				
					if((arr[i]+arr[i+1])<=arr[i+2]) {
						flag=1;
						System.out.println((i+1)+" "+(i+2)+" "+(i+3));
						break;
					}
				
				if(flag==1) {
					break;
				}
			}
			if(flag==0) {
				System.out.println("-1");
			}
		}
		
	}
}
