D1121211233131133131323132213231333131323223313131133132322112121   >>    D112121123313113313132313221323133313132322331313113313232211212   <<    D1121211233131133131323132213231333131323223313131133132322112123   >>      D1121211233131133131323132213231333131323223313131133132322112122   >>