C1111133313331323223313331333133313233231311211331333133313112132313111   >>    C111113331333132322331333133313331323323131121133133313331311213231311   <<    C1111133313331323223313331333133313233231311211331333133313112132313113   >>      C1111133313331323223313331333133313233231311211331333133313112132313112   >>