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