In this task, you need to replace a letter in the sentence with another given letter.
--------
Question: Sentence: 'a red stop signed has been altered to say stop hate'. Replace the letter 'e' with 't' in the sentence.

Answer: a rtd stop signtd has bttn alttrtd to say stop hatt


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: 'three green traffic lights some buildings and trees'. Replace the letter 't' with 'h' in the sentence.

Answer:
hhree green hraffic lighhs some buildings and hrees