C1111133313331323223313331333133313331323131313121111113313131221   >>    C111113331333132322331333133313331333132313131312111111331313122   <<    C1111133313331323223313331333133313331323131313121111113313131223   >>      C1111133313331323223313331333133313331323131313121111113313131222   >>