B3311331313231311331322331333132313231333131323223313232212121111123131   >>    B331133131323131133132233133313231323133313132322331323221212111112313   <<    B3311331313231311331322331333132313231333131323223313232212121111123133   >>      B3311331313231311331322331333132313231333131323223313232212121111123132   >>