1def beginning(str):
 2    if len(str) % 3 == 2:
 3        a = len(str) // 3
 4        beg = str[:a + 1]
 5        return beg
 6    else:
 7        a = len(str) // 3
 8        beg = str[:a]
 9        return beg
10
11def middle(str):
12    if len(str) % 3 == 0:
13        a = len(str) // 3
14        beg = str[a : 2 * a]
15        return beg
16    elif len(str) % 3 == 1:
17        a = len(str) // 3
18        beg = str[a : 2 * a + 1]
19        return beg
20    else:
21        a = len(str) // 3
22        beg = str[a + 1 : 2 * a + 1]
23        return beg
24
25
26def end(str):
27    if len(str) % 3 == 0:
28        a = len(str) // 3
29        beg = str[2 * a : len(str)]
30        return beg
31    else:
32        a = len(str) // 3
33        beg = str[2 * a + 1: len(str)]
34        return beg
35
36def split_sentence(str):
37    arr = []
38    index = 0
39    pom = 0
40    for i in str:
41        index = index + 1
42        if i == ' ':
43            arr.append(str[pom : index - 1])
44            pom = index
45    arr.append(str[pom : len(str)])
46
47    i = 0
48    for e in arr:
49        arr[i] = tuple([beginning(arr[i]), middle(arr[i]), end(arr[i])])
50        i = i + 1
51
52    return arr
53    
54
55
56#print(split_sentence("Kazvam se Jhon Snow"))