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 man extends his arm with a frisbee in hand as another reaches to grab it while teammates watch'. Replace the letter 'a' with 'g' in the sentence.
g mgn extends his grm with g frisbee in hgnd gs gnother regches to grgb it while tegmmgtes wgtch

Sentence: 'that is an odd picture painted on that aircraft'. Replace the letter 'c' with 's' in the sentence.
that is an odd pisture painted on that airsraft