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