B3311331313231311331322331333132313331322331323133313113313231323211232311   >>    B331133131323131133132233133313231333132233132313331311331323132321123231   <<    B3311331313231311331322331333132313331322331323133313113313231323211232313   >>      B3311331313231311331322331333132313331322331323133313113313231323211232312   >>