proposition: Lemma maze1 (P Q R S T U: Prop) (p : P) (h : P → Q) (i : Q → R) (j : Q → T) (k : S → T) (l : T → U) : U.
proof: Proof. pose (q := h(p)). pose (t := j(q)). pose (u := l(t)). exact u. Qed.
imports: Unicode.Utf8 Game.World.Addition