TextSum.py

#!/usr/bin/python3

def generate_solutions(letters, digits):
    if len(letters) == 6:
        if is_solution(letters):
            print("solution",letters)
            return
    else:
        for i in digits:
            remaining_digits = digits[:]
            remaining_digits.remove(i)
            generate_solutions(letters+[i],remaining_digits)

def is_solution(letters):
    t = letters[0]
    w = letters[1]
    o = letters[2]
    f = letters[3]
    u = letters[4]
    r = letters[5]
    if 2*(t*100+w*10+o) == f*1000+o*100+u*10+r:
        return True
    return False

generate_solutions([],[0,1,2,3,4,5,6,7,8,9])