Let's call some positive integer classy if its decimal representation contains no more than $3$ non-zero digits. For example, numbers $4$, $200000$, $10203$ are classy and numbers $4231$, $102306$, $7277420000$ are not.

You are given a segment $[L; R]$. Count the number of classy integers $x$ such that $L \le x \le R$.

Each testcase contains several segments, for each of them you are required to solve the problem separately.


-----Input-----

The first line contains a single integer $T$ ($1 \le T \le 10^4$) — the number of segments in a testcase.

Each of the next $T$ lines contains two integers $L_i$ and $R_i$ ($1 \le L_i \le R_i \le 10^{18}$).


-----Output-----

Print $T$ lines — the $i$-th line should contain the number of classy integers on a segment $[L_i; R_i]$.


-----Example-----
Input
4
1 1000
1024 1024
65536 65536
999999 1000001

Output
1000
1
0
2

```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 = "USE_STDIO = False\n\nif not USE_STDIO:\n    try: import mypc\n    except: pass\n\ndef Cnk(n, k):\n    ans = 1\n    for i in range(k):\n        ans *= n - i\n        ans //= i + 1\n    return ans\n\ndef main():\n    num = [[0] * 4 for _ in range(19)]\n    for i in range(19):\n        for j in range(4):\n            if j: num[i][j] += num[i][j-1]\n            if i >= j:\n                num[i][j] += 9 ** j * Cnk(i, j)\n    \n    def count(n):\n        if n == 0: return 0\n        n = list(map(int, str(n)))\n        l = len(n)\n        ans = 0\n        for i in range(1, l):\n            ans += 9 * num[i - 1][2]\n        cur = 3\n        for i in range(l):\n            if n[i] > 0:\n                ans += (n[i] - 1) * num[l - i - 1][cur - 1]\n                if i: ans += num[l - i - 1][cur]\n                cur -= 1\n                if cur <= 0: break\n        ans += 1\n        return ans\n\n    q,  = list(map(int, input().split(' ')))\n    for _ in range(q):\n        L, R = list(map(int, input().split(' ')))\n        ans = count(R) - count(L - 1)\n        print(ans)\n\ndef __starting_point():\n    main()\n\n\n\n\n__starting_point()"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

```

Measured memory_bytes: 25039