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

Example Input: Sentence: 'a photo of a woman milking a brown cow'. Replace the letter 'k' with 'q' in the sentence.
Example Output: a photo of a woman milqing a brown cow

Example Input: Sentence: 'a young boy riding his skateboard down the sidewalk'. Replace the letter 'd' with 'p' in the sentence.
Example Output: a young boy riping his skateboarp pown the sipewalk

Example Input: Sentence: 'a bottle of ale sitting next to a wine glass on a table'. Replace the letter 's' with 'm' in the sentence.
Example Output:
a bottle of ale mitting next to a wine glamm on a table