Chefina has two sequences $A_1, A_2, \ldots, A_N$ and $B_1, B_2, \ldots, B_N$. She views two sequences with length $N$ as identical if, after they are sorted in non-decreasing order, the $i$-th element of one sequence is equal to the $i$-th element of the other sequence for each $i$ ($1 \le i \le N$).
To impress Chefina, Chef wants to make the sequences identical. He may perform the following operation zero or more times: choose two integers $i$ and $j$ $(1 \le i,j \le N)$ and swap $A_i$ with $B_j$. The cost of each such operation is $\mathrm{min}(A_i, B_j)$.
You have to find the minimum total cost with which Chef can make the two sequences identical.

-----Input-----
- The first line of the input contains a single integer $T$ denoting the number of test cases. The description of $T$ test cases follows.
- The first line of each test case contains a single integer $N$.
- The second line contains $N$ space-separated integers $A_1, A_2, \ldots, A_N$.
- The third line contains $N$ space-separated integers $B_1, B_2, \ldots, B_N$.

-----Output-----
For each test case, print a single line containing one integer ― the minimum cost, or $-1$ if no valid sequence of operations exists.

-----Constraints-----
- $1 \le T \le 2,000$
- $1 \le N \le 2 \cdot 10^5$
- $1 \le A_i, B_i \le 10^9$ for each valid $i$
- the sum of $N$ over all test cases does not exceed $2 \cdot 10^6$

-----Subtasks-----
Subtask #1 (15 points):
- $T \le 20$
- $N \le 20$
Subtask #2 (85 points): original constraints

-----Example Input-----
3
1
1
2
2
1 2
2 1
2
1 1
2 2

-----Example Output-----
-1
0
1

-----Explanation-----
Example case 1: There is no way to make the sequences identical, so the answer is $-1$.
Example case 2: The sequence are identical initially, so the answer is $0$.
Example case 3: We can swap $A_1$ with $B_2$, which makes the two sequences identical, so the answer is $1$.

```python

USER_FILENAME = "<user_code>"
import sys, json, builtins
import math, heapq, bisect, itertools, functools, collections, statistics, fractions, decimal, operator, array, random, re, string, os, pathlib
try:
    import resource as _res
except Exception:
    _res = None
from collections import Counter, defaultdict, deque, OrderedDict
from functools import lru_cache, reduce
from itertools import accumulate, permutations, combinations, product
from math import gcd, ceil, floor, sqrt
from decimal import Decimal
try:
    from typing import *
except Exception:
    pass
try:
    sys.setrecursionlimit(1_000_000)
except Exception:
    pass
try:
    import site as _site
    try:
        _sys_sites = _site.getsitepackages() if hasattr(_site, "getsitepackages") else []
        for _p in _sys_sites:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
    try:
        _usp = _site.getusersitepackages()
        if isinstance(_usp, str):
            _usp = [_usp]
        for _p in _usp:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
except Exception:
    pass

ns = {"__name__": "__main__"}
for _k, _v in list(globals().items()):
    if not _k.startswith("_"):
        ns[_k] = _v
_CODE = 'for _ in range(int(input())):\n n=int(input())\n a=list(map(int,input().split()))\n b=list(map(int,input().split()))\n min_a=min(a)\n min_b=min(b)\n m=min(min_a,min_b)\n da={}\n for item in a:\n  if(item in da):\n   da[item]+=1\n  else:\n   da[item]=1\n for item in b:\n  if(item in da):\n   da[item]+=1\n  else:\n   da[item]=1\n # print(da)\n correct={}\n pos=1\n for key,value in list(da.items()):\n  if(value %2):\n   pos=0\n   break\n  else:\n   correct[key]=value //2\n # print(correct)\n if(pos==0):\n  print(-1)\n  continue\n ref=correct.copy()\n # vector var1,var2\n # print(correct)\n var1=[]\n var2=[]\n for i in range(0,n):\n  if(ref[a[i]]):\n   ref[a[i]]-=1\n  else:\n   var1.append(a[i])\n ref=correct.copy()\n for i in range(0,n):\n  if(ref[b[i]]):\n   ref[b[i]]-=1\n  else:\n   var2.append(b[i])\n if(len(var1)==0):\n  print(0)\n  continue\n if(len(var1) != len(var2)):\n  print(-1)\n  continue\n final_value=0\n var1.sort()\n var2.sort(reverse=True)\n for i in range(0,len(var1)):\n  final_value+=min(2*m,min(var1[i],var2[i]))\n print(final_value)\n'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

```

Measured memory_bytes: 14173