# Solve the problems below        # The number of turns allowed is a global constant    NB_TURNS = 10        def pick_random_word():        """Opens the words.txt file, picks and returns a random word from the file"""        #CODE HERE !        return selected_word        def show_letters_in_word(word, letters):        """        This function RETURNS A STRING.        This function scans the word letter by letter.        First, make sure word is uppercase, and all letters are uppercase.        If the letter of the word is in the list of letters, keep it.        Otherwise, replace it with an underscore (_).            DO NOT USE PRINT!            Example:        >>> show_letters_in_word("VANCOUVER", ["A", "V"])        'V A _ _ _ _ V _ _'        >>> show_letters_in_word("TIM", ["G", "V"])        '_ _ _'        >>> show_letters_in_word("PIZZA", ["A", "I", "P", "Z"])        'P I Z Z A'        """        #CODE HERE        return my_string        def all_letters_found(word, letters):        """Returns True if all letters in word are in the list 'letters'"""        return False        def main(turns):        """        Runs the game. Allows for "turns" loops (attempts).        At each turn:        1. Ask the user for a letter        2. Add the letter to the list of letters already tried by the player        3. If the letter was already tried, ask again        4. Use the show_letters_in_word function to display hints about the word        5. Remove 1 to the number of tries left        6. Check if the player            - won (= word has been found)            - lost (= word has not been found, no tries left)                """        # CODE HERE        pass        if __name__ == "__main__":        main(NB_TURNS)    Test to see if it works        import pytest    from hangman import show_letters_in_word, all_letters_found        def test_show_letters_1():        assert show_letters_in_word("Vancouver", ["A", "V"]) == "V A _ _ _ _ V _ _"        assert show_letters_in_word("Vancouver", ["a", "v"]) == "V A _ _ _ _ V _ _"        assert show_letters_in_word("TIM", ["G", "V"]) == "_ _ _"        assert show_letters_in_word("PIZZA", ["A", "I", "P", "Z"]) == "P I Z Z A"        def test_all_letters():        assert all_letters_found("PIZZA", ["A", "I", "P", "Z"]) is True        assert all_letters_found("PIZZA", ["A", "I", "P", "Z", "K", "T"]) is True        assert all_letters_found("VANCOUVER", ["A", "V"]) is False    Words.txt file        absurd    abyss    affix    askew    avenue    awkward    axiom    azure    banjo    bayou    bikini    blitz    boggle    boxcar    boxful    buffalo    buffoon    buxom    buzzard    buzzing    caliph    cobweb    croquet    crypt    curacao    cycle    dirndl    disavow    duplex    dwarves    equip    euouae    exodus    faking    fixable    fjord    flyby    fuchsia    funny    gabby    galaxy    gazebo    giaour    gizmo    glyph    gnarly    gnostic    gossip    haiku    hyphen    icebox    injury    ivory    ivy    jackpot    jaywalk    jazzy    jelly    jigsaw    jinx    jockey    jogging    joking    jovial    joyful    juicy    jukebox    jumbo    kayak    kazoo    keyhole    khaki    kiosk    kitsch    klutz    larynx    lengths    lucky    luxury    lymph    marquis    matrix    mystify    naphtha    nymph    onyx    ovary    oxidize    oxygen    pajama    phlegm    pixel    pizazz    polka    pshaw    psyche    puppy    quartz    queue    quips    quiz    quizzes    quorum    rhubarb    rhythm    scratch    shiv    snazzy    sphinx    spritz    squawk    staff    stretch    stymied    subway    swivel    topaz    twelfth    unknown    unzip    uptown    vixen    vodka    voodoo    vortex    walkway    waltz    wave    wavy    waxy    wheezy    whiskey    wimpy    wizard    woozy    wyvern    yippee    yoked    yummy    zephyr    zigzag    zilch    zipper    zodiac    zombie