B3311331313231311331322331333132333132332113313331333133313231132121   >>    B331133131323131133132233133313233313233211331333133313331323113212   <<    B3311331313231311331322331333132333132332113313331333133313231132123   >>      B3311331313231311331322331333132333132332113313331333133313231132122   >>