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1#!/usr/bin/env python3 

2"""Solution to chapter 2, exercise 7: ubbi_dubbi""" 

3 

4 

5def ubbi_dubbi(): 

6 word = input("Enter a word: ") 

7 

8 output = [] 

9 for letter in word: 

10 if letter in 'aeiou': 

11 output.append(f'ub{letter}') 

12 else: 

13 output.append(letter) 

14 

15 print(''.join(output))