B3311331313231311331322331333132313232233131311331333132313231323132211211321   >>    B331133131323131133132233133313231323223313131133133313231323132313221121132   <<    B3311331313231311331322331333132313232233131311331333132313231323132211211323   >>      B3311331313231311331322331333132313232233131311331333132313231323132211211322   >>