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