関連ワード:  what is the relative key of c major    what is the parallel key of c major    what is the relative minor key of c major    what is the relative key of c sharp major    what is the parallel minor key of c major    what is the relative minor key of c flat major    what is the relative major key of c sharp minor    what is the relative major key signature of c minor    what is the relative major key to c natural minor    what is the parallel minor of the key of c sharp major