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