D21221323131123313131333132233131133131323223313232212121111331312312311   >>    D2122132313112331313133313223313113313132322331323221212111133131231231   <<    D21221323131123313131333132233131133131323223313232212121111331312312313   >>      D21221323131123313131333132233131133131323223313232212121111331312312312   >>