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