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