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

Input: Consider Input: Sentence: 'a motorcycle sitting on the side of the road by grass'. Replace the letter 'r' with 't' in the sentence.

Output: a mototcycle sitting on the side of the toad by gtass


Input: Consider Input: Sentence: 'a mobile phone and a set of keys on a key chain'. Replace the letter 's' with 'j' in the sentence.

Output: a mobile phone and a jet of keyj on a key chain


Input: Consider Input: Sentence: 'a black and white picture of a hitter awaiting a pitch while a teammate stands in the on deck circle'. Replace the letter 'a' with 'm' in the sentence.


Output: m blmck mnd white picture of m hitter mwmiting m pitch while m temmmmte stmnds in the on deck circle