Bob watches TV every day. He always sets the volume of his TV to $b$. However, today he is angry to find out someone has changed the volume to $a$. Of course, Bob has a remote control that can change the volume.

There are six buttons ($-5, -2, -1, +1, +2, +5$) on the control, which in one press can either increase or decrease the current volume by $1$, $2$, or $5$. The volume can be arbitrarily large, but can never be negative. In other words, Bob cannot press the button if it causes the volume to be lower than $0$.

As Bob is so angry, he wants to change the volume to $b$ using as few button presses as possible. However, he forgets how to do such simple calculations, so he asks you for help. Write a program that given $a$ and $b$, finds the minimum number of presses to change the TV volume from $a$ to $b$.


-----Input-----

Each test contains multiple test cases. The first line contains the number of test cases $T$ ($1 \le T \le 1\,000$). Then the descriptions of the test cases follow.

Each test case consists of one line containing two integers $a$ and $b$ ($0 \le a, b \le 10^{9}$) — the current volume and Bob's desired volume, respectively.


-----Output-----

For each test case, output a single integer — the minimum number of presses to change the TV volume from $a$ to $b$. If Bob does not need to change the volume (i.e. $a=b$), then print $0$.


-----Example-----
Input
3
4 0
5 14
3 9

Output
2
3
2



-----Note-----

In the first example, Bob can press the $-2$ button twice to reach $0$. Note that Bob can not press $-5$ when the volume is $4$ since it will make the volume negative. 

In the second example, one of the optimal ways for Bob is to press the $+5$ twice, then press $-1$ once.

In the last example, Bob can press the $+5$ once, then press $+1$.

```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 = 'import io, sys, atexit, os\nimport math as ma\nfrom decimal import Decimal as dec\nfrom itertools import permutations\nfrom itertools import combinations\n\n\ndef li():\n    return list(map(int, sys.stdin.readline().split()))\n\n\ndef num():\n    return map(int, sys.stdin.readline().split())\n\n\ndef nu():\n    return int(input())\n\n\ndef find_gcd(x, y):\n    while (y):\n        x, y = y, x % y\n    return x\n\n\ndef lcm(x, y):\n    gg = find_gcd(x, y)\n    return (x * y // gg)\n\n\nmm = 1000000007\n\n\ndef solve():\n    t = nu()\n    for tt in range(t):\n        a,b=num()\n        if(a<=b):\n            dd=b-a\n            pq=dd//5\n            yp=dd%5\n            yo=yp//2\n            yu=yp%2\n            print(pq+yu+yo)\n        else:\n            a,b=b,a\n            dd = b - a\n            pq = dd // 5\n            yp = dd % 5\n            yo = yp // 2\n            yu = yp % 2\n            print(pq + yu + yo)\n\n\ndef __starting_point():\n    solve()\n__starting_point()'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

```

Measured memory_bytes: 23795