Python, please!

The task is to remove 'bob' and "kak" patterns from a string. We cannot use any regex libraries! There could be several "a" in "kak" and several "o" in "bob". It should be done in one function. The function receives a string through input prompt and removes "bob" and "kak"

For example:

Input ckakheggbooob - output chegg

input cheggbob - output chegg

input chegkakg - output chegg and so on.