This Python script generates English words from input letters. Letters are input in as one word, e.g. "abc" for letters a, b, and c. A minimum length for the generated words is also taken as input. I wrote this script to solve levels in the game Word Cookies.

words-from-letters.py

import enchant
import math
import sys
from itertools import permutations

# read in letters and constraints from the user
letters = input("Letters (no delimiters): ")
min_len = input("Min length of words: ")

# make sure user entered correct input types
if not letters.isalpha() or not min_len.isdigit():
    print ("Input type did not match what the prompt asked for.")
    sys.exit()
if len(letters) <= 2:
    print ("You must enter more than two letters")
    sys.exit()

# turn min length into an int
min_len = int(min_len)

# set up spell checker
dict = enchant.Dict("en_US")

# get permutations from the given letters and
# add it to list if it is an English word
words = list()
for i in range(min_len, len(letters) + 1):
    for p in permutations(letters, i):
        if dict.check(''.join(p)):
            words.append(''.join(p))

# sort words alphabetically and by length
words.sort(key=str.lower)
words.sort(key=len)

# print the permuted words with each line containing words of the same length
cur_word_len = len(words[0])
num_of_inital_letters = 2
n = len(letters) - num_of_inital_letters

for word in words:

    if len(word) != cur_word_len:
        cur_word_len = len(word)
        print()
    
    print (word + '\t', end="")