In this task, you need to replace a letter in the sentence with another given letter.
--------
Question: Sentence: 'some brown black and white horses clouds and rocks'. Replace the letter 'a' with 'n' in the sentence.

Answer: some brown blnck nnd white horses clouds nnd rocks


Question: Sentence: 'little tubs of rice and mixed vegetables for a meal'. Replace the letter 't' with 'z' in the sentence.

Answer: lizzle zubs of rice and mixed vegezables for a meal


Question: Sentence: 'a man looking into a giraffe pen'. Replace the letter 'f' with 'y' in the sentence.

Answer:
a man looking into a girayye pen