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