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