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

Sentence: 'a family opens gifts in a room with their dog, while sitting on couches'. Replace the letter 's' with 'l' in the sentence.
a family openl giftl in a room with their dog, while litting on couchel

Sentence: 'a man swinging at a tennis with a racquet on a court'. Replace the letter 't' with 'c' in the sentence.
a man swinging ac a cennis wich a racquec on a courc

Sentence: 'a man in business pants and shoes pitching a baseball on a pitchers mound'. Replace the letter 'a' with 'g' in the sentence.

g mgn in business pgnts gnd shoes pitching g bgsebgll on g pitchers mound