def get_file(fn):
    with open(fn, 'r') as f:
        return list(map(lambda x: x[1:-1], f.read().split(',')))

def get_pair(lst):
    for i in range(len(lst) - 1):
        for j in range(i + 1, len(lst)):
            yield (lst[i], lst[j])

def calc_rearray(pair):
    def do_iter(para):
        repeat = {}
        for ch in para[0]:
            map_index = para[1].find(ch, repeat.setdefault(ch, 0))
            yield map_index
            repeat[ch] = map_index + 1
    return tuple(do_iter(pair))

def reverse_rearray(map_rearray):
    def do_iter(para):
        for i in sorted(para):
            yield para.index(i)
    return tuple(do_iter(map_rearray))

def word_rearray(lst):
    pick = {}
    for item in lst:
        s_item = ''.join(sorted(item))
        pick.setdefault(s_item, []).append(item)
    result = {}
    while len(pick):
        key, value = pick.popitem()
        if len(value) > 1:
            for pair in get_pair(value):
                map_rearray = calc_rearray(pair)
                result.setdefault(map_rearray, []).append(pair)
                result.setdefault(reverse_rearray(map_rearray), []).append(tuple(reversed(pair)))
    return result

def pow_range(digit):
    return int((10 ** (digit // 2)) * ((10 ** 0.5) ** (digit % 2)))

def num_power(digit):
    return list(map(lambda x: str(x ** 2), range(pow_range(digit - 1), pow_range(digit) + 1)))

def num_rearray(digit):
    result = []
    for n in range(3, digit + 1):
        result.append(word_rearray(num_power(n)))
    return result

print(sorted(word_rearray(get_file('../resource/words.txt')), key=lambda x: len(x)))
#print(num_rearray(9))