In this task, you're given the title of a story consisting of five sentences, numbered 1 through 5. Your job is to determine which two sentences need to be swapped sentences in order to make a story that makes complete sense and is befittingly titled. Indicate your answer using the numbers of the two sentences in order, such as '34' or '25'. The first digit refers to the sentence which should come first in the story.

Title: Babysitting. Sentence 1: She was new to the job before him. Sentence 2: Aly regularly babysat a two year old. Sentence 3: One day he threw a tantrum. Sentence 4: Aly was now scared to babysit the two year old. Sentence 5: She asked her friend to do it for her.
12

Title: Lexi wants to be a singer. Sentence 1: Lexi had a passion for singing and music. Sentence 2: She wanted to sing but was very nervous about performing. Sentence 3: Lexi finally got the courage to try to sing. Sentence 4: Lexi took the stage and realized her dreams. Sentence 5: She entered a local talent show in her home town.
45

Title: Hammer. Sentence 1: Marian told himself to be more careful. Sentence 2: He missed and stubbed his finger. Sentence 3: He went to get a bandage. Sentence 4: He checked his finger and it was swollen and purple. Sentence 5: Marian was hitting a nail with his hammer.
51