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

Example Input: Sentence: 'two tennis players shaking hands across the net'. Replace the letter 't' with 's' in the sentence.
Example Output: swo sennis players shaking hands across she nes

Example Input: Sentence: 'a dog standing near a potted plant outside'. Replace the letter 'a' with 'j' in the sentence.
Example Output: j dog stjnding nejr j potted pljnt outside

Example Input: Sentence: 'school is out and the students cross the street to their bus'. Replace the letter 't' with 'x' in the sentence.
Example Output:
school is oux and xhe sxudenxs cross xhe sxreex xo xheir bus