D1212121221323132313232332313232233132333132312111133132333132313221231   >>    D121212122132313231323233231323223313233313231211113313233313231322123   <<    D1212121221323132313232332313232233132333132312111133132333132313221233   >>      D1212121221323132313232332313232233132333132312111133132333132313221232   >>