shuffle.py

import random
import sys
import re


def mix_word(s):
    if len(s) < 3:
        return s
    middle = list(s[1:-1])
    random.shuffle(middle)
    return s[0] + ''.join(middle) + s[-1]


def mix_text(s):
    return re.compile('\w+', re.UNICODE).sub(lambda m: mix_word(m.group(0)), s)


if __name__ == '__main__':
    sys.stdout.write(mix_text(sys.stdin.read()))