<Ul> <Li> P--14: Pre-school to associate degree </Li> <Li> P--16: Pre-school to bachelor's degree </Li> <Li> P--18: Pre-school to master's degree </Li> <Li> P--20: Pre-school to graduate degree </Li> <Li> K--14: Kindergarten to associate degree </Li> <Li> K--16: Kindergarten to bachelor's degree </Li> <Li> K--18: Kindergarten to master's degree </Li> <Li> K--20: Kindergarten to graduate degree </Li> </Ul> <Li> P--14: Pre-school to associate degree </Li> <Li> P--16: Pre-school to bachelor's degree </Li> <Li> P--18: Pre-school to master's degree </Li>

What is the grading system of k 12