In this task, you need to replace a letter in the sentence with another given letter.
Q: Sentence: 'a boy in jeans and a gray shirt stands near a green tree and in the air is a large triangle flag'. Replace the letter 'i' with 'j' in the sentence.
A:
a boy jn jeans and a gray shjrt stands near a green tree and jn the ajr js a large trjangle flag