C1111133313331323223313331333133313311211111211331333131211111133231221   >>    C111113331333132322331333133313331331121111121133133313121111113323122   <<    C1111133313331323223313331333133313311211111211331333131211111133231223   >>      C1111133313331323223313331333133313311211111211331333131211111133231222   >>