C11111333133313232233133313331333133112111133132313113313122321   >>    C1111133313331323223313331333133313311211113313231311331312232   <<    C11111333133313232233133313331333133112111133132313113313122323   >>      C11111333133313232233133313331333133112111133132313113313122322   >>