#!/usr/bin/env python

import random
import string

try:
    from tqdm import tqdm
except ImportError:
    def tqdm(x):
        return x


MIN_LENGTH = 4
VOWELS = 'aeiouAEIOU'


def strip_initial_consonants(word):
    init = ''
    while word and word[0] not in VOWELS:
        init += word[0]
        word = word[1:]
    return (init, word)


def main(argv):
    filenames = argv[1:]

    words = []

    for filename in tqdm(filenames):
        with open(filename, 'r') as f:
            for line in f:
                bits = line.strip().split()
                for bit in bits:
                    words.extend(bit.split('--'))

    sentences = []
    sentence = []
    for word in tqdm(words):
        if word.startswith(('"', "'")):
            word = word[1:]
        if word.endswith(('"', "'")):
            word = word[:-1]
        sentence.append(word)
        if word not in ('Mr.', 'Mrs.', 'Dr.') and word.endswith(('.', '!', '?')):
            sentences.append(sentence)
            sentence = []

    sentences.append(sentence)

    for sentence in sentences:
        if len(sentence) >= 2:
            pos1 = random.randint(0, len(sentence)-1)
            word1 = sentence[pos1]
            
            pos2 = pos1
            word2 = word1
            while word1 == word2:
               pos2 = random.randint(0, len(sentence)-1)
               word2 = sentence[pos2]
            
            (cons1, base1) = strip_initial_consonants(word1)
            (cons2, base2) = strip_initial_consonants(word2)
            
            sentence[pos1] = cons2 + base1
            sentence[pos2] = cons1 + base2

        print ' '.join(sentence)


if __name__ == '__main__':
    import sys
    main(sys.argv)