Brute

from string import ascii_lowercase as letters
from itertools import product

"""
    (regardless keep the len of the word smaller)
    if you want to try upper and lowercase use ascii_letters
    for realistic passsword import ascii_letters, digits, punctuation

"""

target = input("Enter target word: ")

alpha = letters + " "

for password in product(alpha, repeat=len(target)):
    print("".join(password))