D131333132213233313233313131133132333132313223313231323212331121   >>    D13133313221323331323331313113313233313231322331323132321233112   <<    D131333132213233313233313131133132333132313223313231323212331123   >>      D131333132213233313233313131133132333132313223313231323212331122   >>