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 well dressed man standing near his early bicycle'. Replace the letter 'e' with 'd' in the sentence.
Example Output: a wdll drdssdd man standing ndar his darly bicycld

Example Input: Sentence: 'a tall clock tower standing between barren trees'. Replace the letter 'e' with 's' in the sentence.
Example Output:
a tall clock towsr standing bstwssn barrsn trsss