B3311331313231311331322331333132313331322331323133313331331123313123232111   >>    B331133131323131133132233133313231333132233132313331333133112331312323211   <<    B3311331313231311331322331333132313331322331323133313331331123313123232113   >>      B3311331313231311331322331333132313331322331323133313331331123313123232112   >>