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

Sentence: 'a girl riding a horse is jumping the log'. Replace the letter 'a' with 't' in the sentence.
t girl riding t horse is jumping the log

Sentence: 'a group of young adults are engaged in outdoor exercise'. Replace the letter 'g' with 'n' in the sentence.
a nroup of younn adults are ennaned in outdoor exercise

Sentence: 'a kite that is being flown over a body of water'. Replace the letter 'l' with 'd' in the sentence.

a kite that is being fdown over a body of water