B3311331313231311331322331333132313231333131323223313231333132333132312321   >>    B331133131323131133132233133313231323133313132322331323133313233313231232   <<    B3311331313231311331322331333132313231333131323223313231333132333132312323   >>      B3311331313231311331322331333132313231333131323223313231333132333132312322   >>