TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man is on a saddled horse with reins'. Replace the letter 's' with 'o' in the sentence.

SOLUTION: a man io on a oaddled horoe with reino

PROBLEM: Sentence: 'a group of people riding on top of snow boarding equipment'. Replace the letter 'e' with 'x' in the sentence.

SOLUTION: a group of pxoplx riding on top of snow boarding xquipmxnt

PROBLEM: Sentence: 'there is a woman on the beach holding a kite'. Replace the letter 't' with 'i' in the sentence.

SOLUTION:
ihere is a woman on ihe beach holding a kiie