+import Logic
+Succ=\n f x.f (n f x)
+Zero=\f x.x
+One=Succ Zero
+Two=Succ One
+Three=Succ Two
+Add=\n m f x.n f (m f x)
+Mult=\n m f.n (m f)
+IsZero=\n x y.n (\z.y) x
+Add Two Three
+Mult Two Three
+PrintBool (IsZero Zero)
+PrintBool (IsZero (Add One Two))