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

Example Input: Sentence: 'a couch, footrest, tv and other furniture are arranged in a living room'. Replace the letter 'o' with 'g' in the sentence.
Example Output: a cguch, fggtrest, tv and gther furniture are arranged in a living rggm

Example Input: Sentence: 'it pays a cat to be suspicious of what your owner tries to feed you'. Replace the letter 'o' with 'g' in the sentence.
Example Output: it pays a cat tg be suspicigus gf what ygur gwner tries tg feed ygu

Example Input: Sentence: 'a messy area with a messy refrigerator filled with many foods'. Replace the letter 'w' with 'l' in the sentence.
Example Output:
a messy area lith a messy refrigerator filled lith many foods