In this task, you need to replace a letter in the sentence with another given letter.

Ex Input:
Sentence: 'the bus is trying to navigate though the london traffic'. Replace the letter 'a' with 'l' in the sentence.

Ex Output:
the bus is trying to nlviglte though the london trlffic


Ex Input:
Sentence: 'stone and white colored structure in front of white modern building'. Replace the letter 'r' with 'p' in the sentence.

Ex Output:
stone and white coloped stpuctupe in fpont of white modepn building


Ex Input:
Sentence: 'an oval tray has breakfast for two on it'. Replace the letter 'w' with 'c' in the sentence.

Ex Output:

an oval tray has breakfast for tco on it