scramble.py

def read_input(input_filename="input.txt"):
    with open(input_filename) as f:
        return (line.rstrip().split(' ') for line in f.readlines())
        
def scramble_word(word):
    if len(word) > 3:
        from random import shuffle
        middle = list(word[1:-1])
        shuffle(middle)
        new_word = word[0] + str.join('', middle) + word[-1]
        return new_word
    else:
        return word
        
def main():
    lines = read_input()
    for words in lines:
        scrambled = [scramble_word(word) for word in words]
        print str.join(' ', scrambled)
    
if __name__ == '__main__':
    main()