1. # Write your solution here
2.  
3. def first_word(word1: str):
4. # 1.Finding the first word in a sentence
5.  
6.     word_start = 0
7.     word_end = word1.find(" ")
8.     word1 = word1[word_start:word_end]
9.     return word1
10.  
11. def second_word(word2: str):
12.  
13. # Check the sentence if its only of two words and return second word
14.     two_words = ""
15.    
16.     if word2.count(" ") == 1:
17.         two_words = word2.find(" ")
18.         word2 = word2[two_words +1::]
19.  
20.         return word2
21.  
22. # Return the second word of a sentence
23.     start_word2 = first_word(word2) # Once
24.     word2_start = len(start_word2) + 1
25.     word2_end = 0
26.  
27.     i = len(start_word2) + 1
28.  
29.     while i < len(word2):
30.         if word2[i] == " ":
31.             word2_end = i
32.             break
33.         i += 1
34.            
35.        
36.     word2 = word2[len(start_word2) + 1:word2_end]
37.     return word2
38.  
39. def last_word(word3: str):
40.  
41. # Finding the last word of a sentence with for loop using negative itteration  
42.     last_word = ""
43.    
44.     for i in range(len(word3)- 1, -1, -1):
45.         if word3[i] == " ":
46.             last_word = word3[i + 1:]
47.             break
48.  
49.     return last_word
50.            
51.  
52. # You can test your function by calling it within the following block
53.  
54.  
55. if __name__ == "__main__":
56.     sentence = "once upon a time there was a programmer"
57.     print(first_word(sentence))
58.     print(second_word(sentence))
59.     print(last_word(sentence))