Intermediate.java:8: void cannot be dereferenced
System.out.println(((p1).subtract(new Pitch(2))).toString());
                                                ^
Intermediate.java:9: void cannot be dereferenced
System.out.println(((p1).add(new Pitch(2))).toString());
                                           ^
Intermediate.java:10: void cannot be dereferenced
System.out.println(((p1).divide(new Pitch(2))).toString());
                                              ^
Intermediate.java:11: void cannot be dereferenced
System.out.println(((p1).multiply(new Pitch(2))).toString());
                                                ^
4 errors
