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

Input: Consider Input: Sentence: 'a red train sitting at an empty station'. Replace the letter 'i' with 'h' in the sentence.

Output: a red trahn shtthng at an empty stathon


Input: Consider Input: Sentence: 'a man is standing at the base ball triangle with bat in tow'. Replace the letter 'n' with 'c' in the sentence.

Output: a mac is stacdicg at the base ball triacgle with bat ic tow


Input: Consider Input: Sentence: 'a bot standing near a traffic sign looking up at it'. Replace the letter 'a' with 'p' in the sentence.


Output: p bot stpnding nepr p trpffic sign looking up pt it