In this task, you need to replace a letter in the sentence with another given letter.
--------
Question: Sentence: 'nine geese flying south for the winter months'. Replace the letter 't' with 'f' in the sentence.

Answer: nine geese flying soufh for fhe winfer monfhs


Question: Sentence: 'people wait for a train on a snowy sidewalk'. Replace the letter 'n' with 'm' in the sentence.

Answer: people wait for a traim om a smowy sidewalk


Question: Sentence: 'a young man kicking a soccer ball around a field'. Replace the letter 'r' with 'b' in the sentence.

Answer:
a young man kicking a socceb ball abound a field