Let A, B & C be inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies who can either lie or tell the truth. Among A, B & C, one is a knight, one is a knave and one is a spy. Each of the three people knows the type of person each of other two is. For the below situation, if possible, determine whether there is a unique solution and determine who the knave, knight and spy are. When there is no unique solution, list all possible solutions or state that there are no solutions.

A says C is the knave , B says ''A is the knight , and C says "I am the spy .