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

Input: Consider Input: Sentence: 'a fire fighter climbs onto the roof of a market with a ladder'. Replace the letter 'r' with 'k' in the sentence.

Output: a fike fightek climbs onto the koof of a makket with a laddek


Input: Consider Input: Sentence: 'a baby is holding and eating a banana'. Replace the letter 'i' with 'g' in the sentence.

Output: a baby gs holdgng and eatgng a banana


Input: Consider Input: Sentence: 'a man riding a skateboard down a street past a building'. Replace the letter 'e' with 'b' in the sentence.


Output: a man riding a skatbboard down a strbbt past a building