def rotate(temp_ls):
a = temp_ls.pop(0)
temp_ls.append(a)
return temp_ls
def print_func(temp_ls):
for i in temp_ls:
print(i, end = " ")
print("")
for _ in range(int(input())):
n = int(input())
s = list(map(int,input().split()))
ls=[]
x=1
out = []
temp =[]
for i in range(len(s)):
if i == n-1:
if s[i] == s[i-1]:
temp.append(i+1)
else:
temp = [i+1]
if len(temp) == 1:
print("-1")
x = 0
break
for j in rotate(temp):
out.append(j)
elif i == 0:
temp =[i+1]
else:
if s[i] == s[i-1]:
temp.append(i+1)
else:
if len(temp) == 1:
print("-1")
x = 0
break
for j in rotate(temp):
out.append(j)
temp = [i+1]
if x:print_func(out)#include<bits/stdc++.h>
using namespace std;
#define ll long long int
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
int t;
cin>>t;
while(t--)
{
ll n;
cin>>n;
ll a[n];
set<int> s;
map<int,int> m;
for(int i=0;i<n;i++){cin>>a[i]; m[(a[i])]++;}
int f=0;
for(auto x:m)
{
if(x.second==1)
{
cout<<"-1"<<endl;
f=1;
break;
}
}
if(!f)
{
vector<int> v(n+1);
for(int i=1;i<=n;i++)
{
v[i]=i;
}
for(int i=1;i<n;i++)
{
if(a[i-1]==a[i])
{
swap(v[i],v[i+1]);
}
}
for(auto x:v)
{
if(x==0){continue;}
cout<<x<<" ";
}
cout<<endl;
}
}
return 0;
}1384A - Common Prefixes | 371A - K-Periodic Array |
1542A - Odd Set | 1567B - MEXor Mixup |
669A - Little Artem and Presents | 691B - s-palindrome |
851A - Arpa and a research in Mexican wave | 811A - Vladik and Courtesy |
1006B - Polycarp's Practice | 1422A - Fence |
21D - Traveling Graph | 1559B - Mocha and Red and Blue |
1579C - Ticks | 268B - Buttons |
898A - Rounding | 1372B - Omkar and Last Class of Math |
1025D - Recovering BST | 439A - Devu the Singer and Churu the Joker |
1323A - Even Subset Sum Problem | 1095A - Repeating Cipher |
630F - Selection of Personnel | 630K - Indivisibility |
20B - Equation | 600B - Queries about less or equal elements |
1015A - Points in Segments | 1593B - Make it Divisible by 25 |
680C - Bear and Prime 100 | 1300A - Non-zero |
1475E - Advertising Agency | 1345B - Card Constructions |