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