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

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

Output: some brown blnck nnd white horses clouds nnd rocks


Input: Consider Input: Sentence: 'a city street at dusk time with traffic'. Replace the letter 'i' with 'm' in the sentence.

Output: a cmty street at dusk tmme wmth traffmc


Input: Consider Input: Sentence: 'living room chair and ottoman with dining area in background'. Replace the letter 't' with 'a' in the sentence.


Output: living room chair and oaaoman wiah dining area in background