C111123313331323113313331333133313331323112133313331333132313113313223221   >>    C11112331333132311331333133313331333132311213331333133313231311331322322   <<    C111123313331323113313331333133313331323112133313331333132313113313223223   >>      C111123313331323113313331333133313331323112133313331333132313113313223222   >>