B3311331313231311331322331333132313233313231333131133132333131333132233121   >>    B331133131323131133132233133313231323331323133313113313233313133313223312   <<    B3311331313231311331322331333132313233313231333131133132333131333132233123   >>      B3311331313231311331322331333132313233313231333131133132333131333132233122   >>