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

Example Input: Sentence: 'a giraffe sticks its tongue out in the air'. Replace the letter 'e' with 'l' in the sentence.
Example Output: a giraffl sticks its tongul out in thl air

Example Input: Sentence: 'a couple of kids with rackets on a court'. Replace the letter 'u' with 'd' in the sentence.
Example Output: a codple of kids with rackets on a codrt

Example Input: Sentence: 'a black and chrome motorcycle made by harley davidson'. Replace the letter 'm' with 'h' in the sentence.
Example Output:
a black and chrohe hotorcycle hade by harley davidson