In this task, you need to replace a letter in the sentence with another given letter.

Sentence: 'two children who are standing next to a white fire hydrant'. Replace the letter 't' with 'r' in the sentence.
rwo children who are sranding nexr ro a whire fire hydranr

Sentence: 'a person is riding a skateboard in a skateboard park'. Replace the letter 'a' with 'o' in the sentence.
o person is riding o skoteboord in o skoteboord pork

Sentence: 'two giraffes are standing next to each other eating'. Replace the letter 'a' with 'r' in the sentence.

two girrffes rre strnding next to erch other erting