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