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

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

Example Input: Sentence: 'a house cat sits on an oven door, sniffing the oven racks inside'. Replace the letter 'i' with 'y' in the sentence.
Example Output: a house cat syts on an oven door, snyffyng the oven racks ynsyde

Example Input: Sentence: 'the little league player is pitching a baseball'. Replace the letter 'a' with 'g' in the sentence.
Example Output:
the little leggue plgyer is pitching g bgsebgll