+Combinatory Logic
+-----------------
+
+Reduce the following forms, if possible:
+
+1. Kxy
+2. KKxy
+3. KKKxy
+4. SKKxy
+5. SIII
+6. SII(SII)
+
+* Give Combinatory Logic combinators that behave like our boolean functions.
+ You'll need combinators for true, false, neg, and, or, and xor.
+
+Using the mapping specified in the lecture notes,
+translate the following lambda terms into combinatory logic:
+
+1. \x.x
+2. \xy.x
+3. \xy.y
+4. \xy.yx
+5. \x.xx
+6. \xyz.x(yz)
+
+* For each translation, how many I's are there? Give a rule for
+ describing what each I corresponds to in the original lambda term.