TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a street side tree is filled with candles, teddy bears and balloons'. Replace the letter 'e' with 'c' in the sentence.

SOLUTION: a strcct sidc trcc is fillcd with candlcs, tcddy bcars and balloons

PROBLEM: Sentence: 'two tennis players shaking hands across the net'. Replace the letter 't' with 's' in the sentence.

SOLUTION: swo sennis players shaking hands across she nes

PROBLEM: Sentence: 'a picture of a wet bar in a restaurant'. Replace the letter 'c' with 'y' in the sentence.

SOLUTION:
a piyture of a wet bar in a restaurant