B3311331313231311331322331333132313233313231333131123313331323221123313122321   >>    B331133131323131133132233133313231323331323133313112331333132322112331312232   <<    B3311331313231311331322331333132313233313231333131123313331323221123313122323   >>      B3311331313231311331322331333132313233313231333131123313331323221123313122322   >>