[error] DEADLOCK/NODUP: no remaining values
[error] DEADLOCK/NODUP: no remaining values
        ????????
      +---------
38246 | 65965920
       -689628
        ======
         322582
        -445940
         ======
          987360
         -718723
          ======
          ??????

base: 10
letters: 0123456789
difficulty: hard