TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'the object in the photo seems to be intriguing'. Replace the letter 'c' with 'h' in the sentence.

SOLUTION: the objeht in the photo seems to be intriguing

PROBLEM: Sentence: 'a skier in the midst of a jump'. Replace the letter 'm' with 'd' in the sentence.

SOLUTION: a skier in the didst of a judp

PROBLEM: Sentence: 'a close-up of the engine of a green train'. Replace the letter 's' with 'f' in the sentence.

SOLUTION:
a clofe-up of the engine of a green train