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 = "#JMD\n#Nagendra Jha-4096\n\n \nimport sys\nimport math\n\n#import fractions\n#import numpy\n \n###File Operations###\nfileoperation=0\nif(fileoperation):\n    orig_stdout = sys.stdout\n    orig_stdin = sys.stdin\n    inputfile = open('W:/Competitive Programming/input.txt', 'r')\n    outputfile = open('W:/Competitive Programming/output.txt', 'w')\n    sys.stdin = inputfile\n    sys.stdout = outputfile\n\n###Defines...###\nmod=1000000007\n \n###FUF's...###\ndef nospace(l):\n    ans=''.join(str(i) for i in l)\n    return ans\n \n \n \n##### Main ####\nt=int(input())\nfor tt in range(t):\n    #n=int(input())\n    a,b= map(int, sys.stdin.readline().split(' '))\n    ans=0\n    if(a>b):\n        temp=b\n        b=a\n        a=temp\n    diff=b-a\n    ans+=(diff//5)\n    diff%=5\n    ans+=(diff//2)\n    diff%=2\n    ans+=diff\n    print(ans)\n    #a=list(map(int,sys.stdin.readline().split(' ')))\n    \n    \n#####File Operations#####\nif(fileoperation):\n    sys.stdout = orig_stdout\n    sys.stdin = orig_stdin\n    inputfile.close()\n    outputfile.close()"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

```

Measured memory_bytes: 13439