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

Ex Input:
Sentence: 'a couple of men playing a  game of tennis'. Replace the letter 'n' with 'c' in the sentence.

Ex Output:
a couple of mec playicg a  game of teccis


Ex Input:
Sentence: 'a bunch of signs on a pole on the street'. Replace the letter 'c' with 's' in the sentence.

Ex Output:
a bunsh of signs on a pole on the street


Ex Input:
Sentence: 'the beer is walking by himself in the field'. Replace the letter 'h' with 'm' in the sentence.

Ex Output:

tme beer is walking by mimself in tme field