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

Input: Consider Input: Sentence: 'a bike sitting parked next to a cart in front of some boxes'. Replace the letter 't' with 'x' in the sentence.

Output: a bike sixxing parked nexx xo a carx in fronx of some boxes


Input: Consider Input: Sentence: 'a wooden table topped with lots of sandwiches'. Replace the letter 's' with 'd' in the sentence.

Output: a wooden table topped with lotd of dandwiched


Input: Consider Input: Sentence: 'a clock attached to a building on a street'. Replace the letter 't' with 'd' in the sentence.


Output: a clock addached do a building on a sdreed