There are $n$ segments $[l_i, r_i]$ for $1 \le i \le n$. You should divide all segments into two non-empty groups in such way that there is no pair of segments from different groups which have at least one common point, or say that it's impossible to do it. Each segment should belong to exactly one group.

To optimize testing process you will be given multitest.


-----Input-----

The first line contains one integer $T$ ($1 \le T \le 50000$) — the number of queries. Each query contains description of the set of segments. Queries are independent.

First line of each query contains single integer $n$ ($2 \le n \le 10^5$) — number of segments. It is guaranteed that $\sum{n}$ over all queries does not exceed $10^5$.

The next $n$ lines contains two integers $l_i$, $r_i$ per line ($1 \le l_i \le r_i \le 2 \cdot 10^5$) — the $i$-th segment.


-----Output-----

For each query print $n$ integers $t_1, t_2, \dots, t_n$ ($t_i \in \{1, 2\}$) — for each segment (in the same order as in the input) $t_i$ equals $1$ if the $i$-th segment will belongs to the first group and $2$ otherwise.

If there are multiple answers, you can print any of them. If there is no answer, print $-1$.


-----Example-----
Input
3
2
5 5
2 3
3
3 5
2 3
2 3
3
3 3
4 4
5 5

Output
2 1 
-1
1 1 2 



-----Note-----

In the first query the first and the second segments should be in different groups, but exact numbers don't matter.

In the second query the third segment intersects with the first and the second segments, so they should be in the same group, but then the other group becomes empty, so answer is $-1$.

In the third query we can distribute segments in any way that makes groups non-empty, so any answer of $6$ possible is correct.

```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 = "n = int(input())\n\nfor t in range(n):\n\n    k = int(input())\n    samples = []\n    for i in range(k):\n        samples.append(tuple(map(int, input().split())))\n\n    samples = sorted(enumerate(samples), key=lambda x: x[1])\n\n    tick = 1\n    ans = [1]\n    group_end = samples[0][1][1]\n\n    for si in range(1, len(samples)):\n        now = samples[si][1]\n        if now[0] > group_end:\n            tick = 2\n        else:\n            group_end = max(now[1], group_end)\n            ans.append(1)\n        if tick == 2:\n            ans.extend([2] * (len(samples) - si))\n            break\n\n    ans = sorted(zip(samples, ans))\n    ans = list([x[1] for x in ans])\n    if 2 not in ans:\n        print(-1)\n    else:\n        print(' '.join(map(str, ans)))\n\n"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

```

Measured memory_bytes: 13603