TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
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: 'the cargo train is headed to the next destination'. Replace the letter 'h' with 'x' in the sentence.

SOLUTION: txe cargo train is xeaded to txe next destination

PROBLEM: Sentence: 'a sign that says botox with an arrow is under some traffic signs'. Replace the letter 't' with 'a' in the sentence.

SOLUTION:
a sign ahaa says boaox wiah an arrow is under some araffic signs