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

Input: Consider Input: Sentence: 'a group of people walking along a dirty snow covered road'. Replace the letter 'n' with 'i' in the sentence.

Output: a group of people walkiig aloig a dirty siow covered road


Input: Consider Input: Sentence: 'some tracks for a rail way system near a building'. Replace the letter 'a' with 'h' in the sentence.

Output: some trhcks for h rhil why system nehr h building


Input: Consider Input: Sentence: 'the snowboarder is enjoying h time on the mountain.is'. Replace the letter 'a' with 'o' in the sentence.


Output: the snowboorder is enjoying h time on the mountoin.is