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