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

Ex Input:
Sentence: 'a cat with a pink bow sits underneath something silver'. Replace the letter 'h' with 'n' in the sentence.

Ex Output:
a cat witn a pink bow sits underneatn sometning silver


Ex Input:
Sentence: 'lots of luggage is jammed into the back compartment of a van'. Replace the letter 'o' with 'h' in the sentence.

Ex Output:
lhts hf luggage is jammed inth the back chmpartment hf a van


Ex Input:
Sentence: 'a man in green pants suspenders and a white shirt'. Replace the letter 'g' with 'r' in the sentence.

Ex Output:

a man in rreen pants suspenders and a white shirt