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