intro n hind h
P : ℕ → Prop
⊢ ∀ (n : ℕ), (∀ (m : ℕ), m < n → 8 ≤ m → from_three_five m) → 8 ≤ n → from_three_five n
P : ℕ → Prop
n : ℕ
hind : ∀ (m : ℕ), m < n → 8 ≤ m → from_three_five m
h : 8 ≤ n
⊢ from_three_five n