D121212121213132333132323132313231232313232233131133132313233313221231   >>    D12121212121313233313232313231323123231323223313113313231323331322123   <<    D121212121213132333132323132313231232313232233131133132313233313221233   >>      D121212121213132333132323132313231232313232233131133132313233313221232   >>