C111123313331323113313331333133313331323112133313331311331323231311221123233231   >>    C11112331333132311331333133313331333132311213331333131133132323131122112323323   <<    C111123313331323113313331333133313331323112133313331311331323231311221123233233   >>      C111123313331323113313331333133313331323112133313331311331323231311221123233232   >>