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

Input: Consider Input: Sentence: 'nine geese flying south for the winter months'. Replace the letter 't' with 'f' in the sentence.

Output: nine geese flying soufh for fhe winfer monfhs

Input: Consider Input: Sentence: 'a few zebras that are next to each other'. Replace the letter 'o' with 'u' in the sentence.

Output: a few zebras that are next tu each uther

Input: Consider Input: Sentence: 'a skate boarder pauses at the top of a hill'. Replace the letter 'o' with 'v' in the sentence.
Output: a skate bvarder pauses at the tvp vf a hill