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

Input: Consider Input: Sentence: 'a big bowl of brown food halfway in a small oven'. Replace the letter 'v' with 'k' in the sentence.

Output: a big bowl of brown food halfway in a small oken


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 blurred picture of a laptop and a box of tissues'. Replace the letter 'u' with 'h' in the sentence.


Output: a blhrred picthre of a laptop and a box of tisshes