D131333132213233313233313131133132333132313223313231323221321111   >>    D13133313221323331323331313113313233313231322331323132322132111   <<    D131333132213233313233313131133132333132313223313231323221321113   >>      D131333132213233313233313131133132333132313223313231323221321112   >>