D21221323131123313131333132233131133131323223313232212121111121111   >>    D2122132313112331313133313223313113313132322331323221212111112111   <<    D21221323131123313131333132233131133131323223313232212121111121113   >>      D21221323131123313131333132233131133131323223313232212121111121112   >>