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

Example Input: Sentence: 'there is a woman holding a tennis racket'. Replace the letter 'l' with 's' in the sentence.
Example Output: there is a woman hosding a tennis racket

Example Input: Sentence: 'a kitchen in the midst of renovation is missing it's back-splash and lower cabinetry doors and drawers'. Replace the letter 'a' with 'g' in the sentence.
Example Output: g kitchen in the midst of renovgtion is missing it's bgck-splgsh gnd lower cgbinetry doors gnd drgwers

Example Input: Sentence: 'a close shot of a stop sign near a building'. Replace the letter 'b' with 'u' in the sentence.
Example Output:
a close shot of a stop sign near a uuilding