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

Example Input: Sentence: 'many street signs in front of a building while it is snowing'. Replace the letter 'r' with 'x' in the sentence.
Example Output: many stxeet signs in fxont of a building while it is snowing

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: 'an asian market place with a variety of fruits and men with hats looking at them'. Replace the letter 'a' with 's' in the sentence.
Example Output:
sn ssisn msrket plsce with s vsriety of fruits snd men with hsts looking st them