In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.

Title: Laundry Problems. Sentence 1: Bobby was doing his laundry himself for the first time. Sentence 2: He followed his mother's instructions, carefully sorting colors. Sentence 3: He put the whites in and turned on the machine. Sentence 4: When he came back, his underwear was all pink.
He had accidentally left in a red shirt!