Before Masao is escorted out of the room, he shouts "take out the towel" and declares the towel to have a pattern of a horsehair crab from Lake Suwa. Haibara examines Masao's cards which consist of Ru (る), Ko (こ), Ni (に), and Te (て) in that order. Haibara realizes Masao is telling them to take the words towel (タオル, ta o ru), horsehair crab (ケガニ, ke ga ni), and Lake Suwa (諏訪湖, Su wa ko), and to treat the middle characters as a Japanese particle.