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

Ex Input:
Sentence: 'there is a young baby that is wearing a tie'. Replace the letter 't' with 'c' in the sentence.

Ex Output:
chere is a young baby chac is wearing a cie

Ex Input:
Sentence: 'a man dressed in a knight costume riding a horse performing at a show'. Replace the letter 'e' with 'j' in the sentence.

Ex Output:
a man drjssjd in a knight costumj riding a horsj pjrforming at a show

Ex Input:
Sentence: 'an elderly lady pours some cups of tea on a tray'. Replace the letter 'a' with 'n' in the sentence.

Ex Output:
nn elderly lndy pours some cups of ten on n trny