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#------------------
# User Instructions
#
# Hopper, Kay, Liskov, Perlis, and Ritchie live on
# different floors of a five-floor apartment building.
#
# Hopper does not live on the top floor.
# Kay does not live on the bottom floor.
# Liskov does not live on either the top or the bottom floor.
# Perlis lives on a higher floor than does Kay.
# Ritchie does not live on a floor adjacent to Liskov's.
# Liskov does not live on a floor adjacent to Kay's.
#
# Where does everyone live?
#
# Write a function floor_puzzle() that returns a list of
# five floor numbers denoting the floor of Hopper, Kay,
# Liskov, Perlis, and Ritchie.

import itertools

def floor_puzzle():
    floors = bottom, _, _, _, top = [1,2,3,4,5]
    orders = itertools.permutations(floors)

    for Hopper, Kay, Liskov, Perlis, Ritchie in orders:
        if (Hopper != top
            and Kay != bottom
            and Liskov != top and Liskov != bottom
            and  Perlis - Kay > 0
            and abs(Ritchie - Liskov) != 1
            and abs(Liskov - Kay) != 1):
                return [Hopper, Kay, Liskov, Perlis, Ritchie]