TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a basket holds flowers, twigs, and various fruits'. Replace the letter 'a' with 'g' in the sentence.

SOLUTION: g bgsket holds flowers, twigs, gnd vgrious fruits

PROBLEM: Sentence: 'a tennis racket is sitting in the middle of a tennis field'. Replace the letter 'i' with 'f' in the sentence.

SOLUTION: a tennfs racket fs sfttfng fn the mfddle of a tennfs ffeld

PROBLEM: Sentence: 'a man with glasses standing with a cell phone in his hand on a bridge'. Replace the letter 'e' with 'x' in the sentence.

SOLUTION:
a man with glassxs standing with a cxll phonx in his hand on a bridgx