D1313331322132333132333131311331323133313231123313223313233311211   >>    D131333132213233313233313131133132313331323112331322331323331121   <<    D1313331322132333132333131311331323133313231123313223313233311213   >>      D1313331322132333132333131311331323133313231123313223313233311212   >>