1def beginning(word):
 2    LENGTH = len(word)
 3    numOfCharsToPrint = LENGTH // 3
 4
 5    if LENGTH % 3 == 2:
 6        numOfCharsToPrint += 1
 7
 8    return word[:numOfCharsToPrint]
 9
10
11def middle(word):
12    LENGTH = len(word)
13    numOfCharsToPrint = LENGTH // 3
14    BEGIN_INDEX = numOfCharsToPrint if LENGTH % 3 != 2 else numOfCharsToPrint+1
15
16    if LENGTH % 3 == 1:
17        numOfCharsToPrint += 1
18
19    return word[BEGIN_INDEX:BEGIN_INDEX+numOfCharsToPrint]
20
21
22def end(word):
23    LENGTH = len(word)
24    numOfCharsToPrint = LENGTH // 3
25
26    if LENGTH % 3 == 2:
27        numOfCharsToPrint += 1
28
29    if not numOfCharsToPrint:
30        return ''
31
32    return word[-numOfCharsToPrint:]
33
34
35def split_sentence(sentence):
36    WORDS = sentence.split(' ')
37
38    return [(beginning(word), middle(word), end(word)) for word in WORDS]