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