Q2

for _ in range(int(input())):
    n=int(input())
    nl=[int(x) for x in input().split()]
    for i in range(n):
        nl[i]=[nl[i],i+1]
    nl.sort()
    win=[]
    c=1
    for i in range(n-1):
        if nl[i][0]==nl[i+1][0]:
            c+=1
        else:
            win+=[c]
            c=1
    win+=[c]
    c=0
    for i in range(len(win)):
        for j in range(win[i]):
            print(nl[c][0],end=" ")
            c+=1
        print()
        if c==3:
            break
    print()