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# check status
sudo ufw status
# deny all incoming
sudo ufw default deny incoming
# allow from a specific source IP address or entire subnet to connect to our port 22
sudo ufw allow from 192.168.1.0/24 to any port 22 proto tcp
# enable the ufw
sudo ufw enable

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#!/usr/bin/env python3
# -*- coding:utf-8 -*-

"""An easy action adventure game based on text."""

import random
import time
import uuid
from typing import Dict, Generator, List, Protocol

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#!/usr/bin/env python3
# -*- coding:utf-8 -*-

import mmap
import struct
import socket
import pathlib

from typing import Tuple

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#!/usr/bin/env python3
# -*- coding:utf-8 -*-

import itertools

from typing import Optional

from expression import Expr
from fraction import Frac

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#!/usr/bin/env python3
# _*_ coding:utf-8 _*_

import re


def str_to_int(s: str) -> int:
    if not s:
        return 0
    i = ord(s[0]) - ord("0")

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#!/usr/bin/env python3

def cons_stream(head, tail):
    return (head, delay(tail))


def head(s):
    return s[0]

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use std::collections::HashMap;
use std::fmt;
use std::ops::Add;
use std::sync::Arc;

struct Procedure {
    name: String,
    inner_proc: Arc<dyn Fn(Vec<Value>) -> Value>,
}

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#!/usr/bin/env python

import string
import textwrap
import functools


def filter_not_upper(text: str) -> str:
    return "".join(filter(lambda c: c in string.ascii_uppercase, text))

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/* Who is Lorna's father?
 *
 * Mary Ann Moore’s father has a yacht and so has each of his four friends: Colonel Downing, Mr. Hall, Sir Barnacle Hood, and Dr. Parker.
 * 1. Each of the five also has one daughter and each has named his yacht after a daughter of one of the others.
 * 2. Sir Barnacle’s yacht is the Gabrielle.
 * 3. Mr. Moore owns the Lorna.
 * 4. Mr. Hall the Rosalind.
 * 5. The Melissa, owned by Colonel Downing, is named after Sir Barnacle’s daughter.
 * 6. Gabrielle’s father owns the yacht that is named after Dr. Parker’s daughter.
 */

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/* What in fact was the order in which the five girls were placed?
 *
 * Five schoolgirls sat for an examination. Their parents--so they thought--showed an undue degree of interest
 * in the result. They therefore agreed that, in writing home about the examination, each girl should make one
 * true statement and one untrue one. The following are the relevant passages from their letters:
 *
 * 1. Betty: "Kitty was second in the examination. I was only third."
 * 2. Ethel: "You'll be glad to hear that I was on top. Joan was 2nd."
 * 3. Joan: "I was third, and poor old Ethel was bottom."
 * 4. Kitty: I came out second. Mary was only fourth."