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