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

Input: Consider Input: Sentence: 'a man standing in the water flying a kite'. Replace the letter 'w' with 's' in the sentence.

Output: a man standing in the sater flying a kite

Input: Consider Input: Sentence: 'a city street at dusk time with traffic'. Replace the letter 'i' with 'm' in the sentence.

Output: a cmty street at dusk tmme wmth traffmc

Input: Consider Input: Sentence: 'a skater looks ahead as he rides down a ramp'. Replace the letter 'n' with 'm' in the sentence.
Output: a skater looks ahead as he rides dowm a ramp