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

Ex Input:
Sentence: 'a man walking a horse on a dirt track'. Replace the letter 't' with 's' in the sentence.

Ex Output:
a man walking a horse on a dirs srack


Ex Input:
Sentence: 'a person is looking out of a large window'. Replace the letter 'o' with 'p' in the sentence.

Ex Output:
a perspn is lppking put pf a large windpw


Ex Input:
Sentence: 'a woma putting a pizza into an oven'. Replace the letter 'a' with 'n' in the sentence.

Ex Output:

n womn putting n pizzn into nn oven