D13133313221323331323331323123123233313232233131133132322121111   >>    D1313331322132333132333132312312323331323223313113313232212111   <<    D13133313221323331323331323123123233313232233131133132322121113   >>      D13133313221323331323331323123123233313232233131133132322121112   >>