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

Example Input: Sentence: 'a woman sitting on a wooden chair holding a cat'. Replace the letter 'n' with 'q' in the sentence.
Example Output: a womaq sittiqg oq a woodeq chair holdiqg a cat

Example Input: Sentence: 'broccoli and cooked meat arranged on a plate'. Replace the letter 'c' with 'l' in the sentence.
Example Output: brolloli and looked meat arranged on a plate

Example Input: Sentence: 'a knife that has been used to cut into metal tin'. Replace the letter 'a' with 'u' in the sentence.
Example Output:
u knife thut hus been used to cut into metul tin