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

Ex Input:
Sentence: 'a woman is playing tennis on the tennis court'. Replace the letter 'r' with 'z' in the sentence.

Ex Output:
a woman is playing tennis on the tennis couzt


Ex Input:
Sentence: 'a couch, footrest, tv and other furniture are arranged in a living room'. Replace the letter 'o' with 'g' in the sentence.

Ex Output:
a cguch, fggtrest, tv and gther furniture are arranged in a living rggm


Ex Input:
Sentence: 'some brown black and white horses clouds and rocks'. Replace the letter 'a' with 'n' in the sentence.

Ex Output:

some brown blnck nnd white horses clouds nnd rocks