C11111333133313232233133313331333131133132313311211111211111333131311223311221   >>    C1111133313331323223313331333133313113313231331121111121111133313131122331122   <<    C11111333133313232233133313331333131133132313311211111211111333131311223311223   >>      C11111333133313232233133313331333131133132313311211111211111333131311223311222   >>