C3131313233313113313223313223313112113313233313133313233313232213231221   >>    C313131323331311331322331322331311211331323331313331323331323221323122   <<    C3131313233313113313223313223313112113313233313133313233313232213231223   >>      C3131313233313113313223313223313112113313233313133313233313232213231222   >>