TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a couple of kids are sitting in a field'. Replace the letter 't' with 'v' in the sentence.

SOLUTION: a couple of kids are sivving in a field

PROBLEM: Sentence: 'a bride and a groom look ridiculous as they stuff cake into each other's mouth'. Replace the letter 'd' with 's' in the sentence.

SOLUTION: a brise ans a groom look risiculous as they stuff cake into each other's mouth

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

SOLUTION:
a cmty street at dusk tmme wmth traffmc