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

Example Input: Sentence: 'giraffes behind a fence in the trees'. Replace the letter 'h' with 'l' in the sentence.
Example Output: giraffes belind a fence in tle trees

Example Input: Sentence: 'bananas, oranges and apples are in shades of yellow and orange'. Replace the letter 'r' with 'b' in the sentence.
Example Output: bananas, obanges and apples abe in shades of yellow and obange

Example Input: Sentence: 'a close up of a bench with a dog laying on the ground'. Replace the letter 'c' with 'w' in the sentence.
Example Output:
a wlose up of a benwh with a dog laying on the ground