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