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

Sentence: 'a woman is talking on her white phone'. Replace the letter 'w' with 'r' in the sentence.
a roman is talking on her rhite phone

Sentence: 'a man in black shirt laying on bed with a teddy bear'. Replace the letter 'd' with 'b' in the sentence.
a man in black shirt laying on beb with a tebby bear

Sentence: 'a cow/bull is trying to graze on a rocky beach'. Replace the letter 't' with 'a' in the sentence.

a cow/bull is arying ao graze on a rocky beach