プログラミングのお題スレ Part6©2ch.net

お題：
以下の関係記述からSandyが好きな人、ものを調べるプログラムを書き、
Sandyが好きな人、ものを全部列挙せよ。

Kim likes Robin.
Sandy likes Kim.
Robin likes cats.
Sandy likes people(or animal) who likes cats.
Kim likes people who like Lee and Kim.
Sandy likes Lee.
People(or animal) like myself.