C111123313331323113313331333133313331323112133313331333132313113313231311131   >>    C11112331333132311331333133313331333132311213331333133313231311331323131113   <<    C111123313331323113313331333133313331323112133313331333132313113313231311133   >>      C111123313331323113313331333133313331323112133313331333132313113313231311132   >>