In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.

Sentence1: Tre's bicycle really needed new brakes. Sentence2: Tre saved up all his allowance to take his bike to the shop. Sentence3: On the way a teenager jumped Tre and stole all his money and his bike. Sentence4: Tre walked home crying and empty handed. Sentence5: When he got there he found his mother dead.
A teenager, His mother, Tre

Sentence1: Maggie's 60th Birthday is approaching. Sentence2: She is fearful of growing old. Sentence3: Watching a commercial she sees an anti-aging cream. Sentence4: Maggie reaches into her purse for her credit card. Sentence5: She purchases the cream as a birthday gift to herself.
Maggie

Sentence1: Matt's mom promised a surprise for him after school. Sentence2: He was excited all day. Sentence3: So excited that he wasn't paying attention during math class. Sentence4: When he didn't answer when called, he was given detention. Sentence5: Matt would have to wait longer to find out what was his surprise.
Matt, Matt's mom