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

Example Input: Sentence: 'a child holding a tv remote like a phone'. Replace the letter 'i' with 'b' in the sentence.
Example Output: a chbld holdbng a tv remote lbke a phone

Example Input: Sentence: 'a group of sheep is standing in a grassy field'. Replace the letter 'g' with 'p' in the sentence.
Example Output: a proup of sheep is standinp in a prassy field

Example Input: Sentence: 'individuals riding a boat along a body of water with docked boats along the shoreline'. Replace the letter 't' with 'd' in the sentence.
Example Output:
individuals riding a boad along a body of wader widh docked boads along dhe shoreline