1PIECES = 3
 2
 3
 4def beginning(word):
 5    """Return the beginning part of a word."""
 6
 7    length = len(word)
 8    piece = length // PIECES
 9
10    if length % PIECES == 2:
11        return word[:piece + 1]
12    else:
13        return word[:piece]
14
15
16def middle(word):
17    """Return the middle part of a word."""
18
19    length = len(word)
20    piece = length // PIECES
21
22    if length % PIECES == 1:
23        return word[piece:piece * 2 + 1]
24    elif length % PIECES == 0:
25        return word[piece:piece * 2]
26    else:
27        return word[piece + 1:piece * 2 + 1]
28
29
30def end(word):
31    """Return the end part of a word."""
32
33    length = len(word)
34    piece = length // PIECES
35
36    if length % PIECES == 0:
37        return word[piece * 2:]
38    else:
39        return word[piece * 2 + 1:]
40
41
42def split_sentence(sentence):
43    """Split a sentence into a list of tuples where each tuple contains a word split to three parts."""
44
45    words = sentence.split()
46    result = []
47
48    for word in words:
49        result.append((beginning(word), middle(word), end(word)))
50
51    return result