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