Guess the missing item from this list: γ-6, α-7, β-6, α-1, α-2, α-4, γ-0, γ-7, β-1, β-0, β-7, β-9, γ-5, β-2, α-3, α-5, β-5, α-8, α-0, γ-8, δ-1, γ-4, γ-3, γ-2, γ-9, β-3, δ-2, β-8, γ-1, α-6, δ-0, α-9.
Directly answer with only one item. Item format should match the list format. Provide no explanation. Answer format: "{item}."