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

Example Input: Sentence: 'the color theme in this kitchen is red and black'. Replace the letter 't' with 'v' in the sentence.
Example Output: vhe color vheme in vhis kivchen is red and black

Example Input: Sentence: 'a close up of a train on train tracks at night'. Replace the letter 'n' with 'm' in the sentence.
Example Output: a close up of a traim om traim tracks at might

Example Input: Sentence: 'a black dog sitting under a wooden computer desk holding a mans leg'. Replace the letter 'e' with 'q' in the sentence.
Example Output:
a black dog sitting undqr a woodqn computqr dqsk holding a mans lqg