C111123313331323113313331333133313331323112133313331333132313113313112121   >>    C11112331333132311331333133313331333132311213331333133313231311331311212   <<    C111123313331323113313331333133313331323112133313331333132313113313112123   >>      C111123313331323113313331333133313331323112133313331333132313113313112122   >>