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

Ex Input:
Sentence: 'many street signs in front of a building while it is snowing'. Replace the letter 'r' with 'x' in the sentence.

Ex Output:
many stxeet signs in fxont of a building while it is snowing


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: 'a large television installed in a wood cabinet'. Replace the letter 'c' with 'a' in the sentence.

Ex Output:

a large television installed in a wood aabinet