C1111133313331323223313331333133313233231311211331333132322212221   >>    C111113331333132322331333133313331323323131121133133313232221222   <<    C1111133313331323223313331333133313233231311211331333132322212223   >>      C1111133313331323223313331333133313233231311211331333132322212222   >>