D2313133313133313133313133313231133132333132311113313233313223311   >>    D231313331313331313331313331323113313233313231111331323331322331   <<    D2313133313133313133313133313231133132333132311113313233313223313   >>      D2313133313133313133313133313231133132333132311113313233313223312   >>