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