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