D131333132213233313233313131133132333132313223313231232313232212111   >>    D13133313221323331323331313113313233313231322331323123231323221211   <<    D131333132213233313233313131133132333132313223313231232313232212113   >>      D131333132213233313233313131133132333132313223313231232313232212112   >>