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