C11111333133313232233133313331333131133131121131211113313311222121   >>    C1111133313331323223313331333133313113313112113121111331331122212   <<    C11111333133313232233133313331333131133131121131211113313311222123   >>      C11111333133313232233133313331333131133131121131211113313311222122   >>