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