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