D131333132213233313233313131133132333132313223313231323132211231   >>    D13133313221323331323331313113313233313231322331323132313221123   <<    D131333132213233313233313131133132333132313223313231323132211233   >>      D131333132213233313233313131133132333132313223313231323132211232   >>