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 math\nfrom decimal import Decimal\nimport heapq\nfrom collections import deque\ndef na():\n\tn = int(input())\n\tb = [int(x) for x in input().split()]\n\treturn n,b\n \n \ndef nab():\n\tn = int(input())\n\tb = [int(x) for x in input().split()]\n\tc = [int(x) for x in input().split()]\n\treturn n,b,c\n \n \ndef dv():\n\tn, m = list(map(int, input().split()))\n\treturn n,m\n \n \ndef dva():\n\tn, m = list(map(int, input().split()))\n\ta = [int(x) for x in input().split()]\n\tb = [int(x) for x in input().split()]\n\treturn n,m,b\n \n \ndef eratosthenes(n): \n\tsieve = list(range(n + 1))\n\tfor i in sieve:\n\t\tif i > 1:\n\t\t\tfor j in range(i + i, len(sieve), i):\n\t\t\t\tsieve[j] = 0\n\treturn sorted(set(sieve))\n \n \ndef lol(lst,k):\n\tk=k%len(lst)\n\tret=[0]*len(lst)\n\tfor i in range(len(lst)):\n\t\tif i+k<len(lst) and i+k>=0:\n\t\t\tret[i]=lst[i+k]\n\t\tif i+k>=len(lst):\n\t\t\tret[i]=lst[i+k-len(lst)]\n\t\tif i+k<0:\n\t\t\tret[i]=lst[i+k+len(lst)]\n\treturn(ret)\ndef nm():\n\tn = int(input())\n\tb = [int(x) for x in input().split()]\n\tm = int(input())\n\tc = [int(x) for x in input().split()]\n\treturn n,b,m,c\n \n \ndef dvs():\n\tn = int(input())\n\tm = int(input())\n\treturn n, m \n \ndef fact(a, b):\n\tc = []\n\tans = 0\n\tf = int(math.sqrt(a))\n\tfor i in range(1, f + 1):\n\t\tif a % i == 0:\n\t\t\tc.append(i)\n\tl = len(c)\n\tfor i in range(l):\n\t\tc.append(a // c[i])\n\tfor i in range(len(c)):\n\t\tif c[i] <= b:\n\t\t\tans += 1\n\tif a / f == f and b >= f:\n\t\treturn ans - 1\n\treturn ans\n \n\nt = int(input())\nfor i in range(t):\n\ta ,b = list(map(int, input().split()))\n\tif a == b:\n\t\tprint(0)\n\telse:\n\t\td = abs(a - b)\n\t\tk1 = d//5\n\t\td -= k1 *5 \n\t\tk2 = d // 2\n\t\td -= k2 * 2\n\t\tprint(d + k1 + k2)\n'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

```

Measured memory_bytes: 15051