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