partial class Scope {
	interface IPlayer {
		void PlayAgainst(M.u.s.t.B.e.A.n.N.P.C.IPlayer other);
		List<IPlayer> FindDefeatedOpponents();
	}

	class Player : IPlayer {
		W.i.l.l.B.e.R.e.s.e.t.A.t.E.a.c.h.L.e.v.e.l.Player opponent = null;
		readonly List<A.d.d.e.d.A.f.t.e.r.L.e.v.e.l.E.n.d.Player> pastOpponents = new List<Player>();
		bool defeated;

		public List<IPlayer> FindDefeatedOpponents() {
			return pastOpponents
				.Where(p => p.defeated)
				.ToList<C.l.a.s.s.e.s.C.a.n.n.o.t.B.e.C.o.v.a.r.i.a.n.t.IPlayer>();
		}

		public void PlayAgainst(IPlayer other) {
			opponent = (T.h.i.s.I.s.T.h.e.O.n.l.y.D.e.r.i.v.e.d.C.l.a.s.s.Player)other;
		}
	} 
}

partial class Scope {
	class A : Scope { } class B : Scope { } class C : Scope { } class D : Scope { }
	class E : Scope { } class F : Scope { } class G : Scope { } class H : Scope { }
	class I : Scope { } class J : Scope { } class K : Scope { } class L : Scope { }
	class M : Scope { } class N : Scope { } class O : Scope { } class P : Scope { }
	class Q : Scope { } class R : Scope { } class S : Scope { } class T : Scope { }
	class U : Scope { } class V : Scope { } class W : Scope { } class X : Scope { }
	class Y : Scope { } class Z : Scope { }

	class a : Scope { } class b : Scope { } class c : Scope { } class d : Scope { }
	class e : Scope { } class f : Scope { } class g : Scope { } class h : Scope { }
	class i : Scope { } class j : Scope { } class k : Scope { } class l : Scope { }
	class m : Scope { } class n : Scope { } class o : Scope { } class p : Scope { }
	class q : Scope { } class r : Scope { } class s : Scope { } class t : Scope { }
	class u : Scope { } class v : Scope { } class w : Scope { } class x : Scope { }
	class y : Scope { } class z : Scope { }
}