TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'giraffe standing on a pile of rocks reaching up to a branch with its mouth'. Replace the letter 'g' with 'n' in the sentence.

SOLUTION: niraffe standinn on a pile of rocks reachinn up to a branch with its mouth

PROBLEM: Sentence: 'a white bathroom with a stand alone sink and a shower curtain'. Replace the letter 'a' with 'm' in the sentence.

SOLUTION: m white bmthroom with m stmnd mlone sink mnd m shower curtmin

PROBLEM: Sentence: 'a double decker bus with 2 bikes and a man in front of it'. Replace the letter 'b' with 'c' in the sentence.

SOLUTION:
a doucle decker cus with 2 cikes and a man in front of it