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 = 'import math\ndef combi(L,n):\n    return math.factorial(L)//math.factorial(n)//math.factorial(L-n)\n\n\nT=int(input())\nLR=[list(map(int,input().split())) for i in range(T)]\n\ndef classy(less,nonzero,now):\n    L=len(str(now))\n\n    if less==0:\n        if 3-nonzero>=L:\n            return 10**L\n        else:\n            ANS=1\n            for i in range(1,3-nonzero+1):\n                ANS+=combi(L,i)*(9**i)\n\n            return ANS\n\n    else:\n        if nonzero<=2:\n            if now<=9:\n                return now+1\n            \n            else:\n                if int(str(now)[0])==1:\n                    return classy(1,nonzero+1,int(str(now)[1:]))\\\n                           +classy(0,nonzero,int("9"*(L-1)))\\\n\n                else:\n                    return classy(1,nonzero+1,int(str(now)[1:]))\\\n                           +(int(str(now)[0])-1)*classy(0,nonzero+1,int("9"*(L-1)))\\\n                           +classy(0,nonzero,int("9"*(L-1)))\n\n        else:\n            return 1\n\nfor l,r in LR:\n    print(classy(1,0,r)-classy(1,0,l-1))\n\n            \n        \n                          \n        \n    \n    \n'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

```

Measured memory_bytes: 13101