[error] DEADLOCK/NODUP: no remaining values
            9414
      +---------
1CED6 | 45AEDBE4
       -1CED6
        =====
        93205B
       -9A128D
        ======
         9C800E
        -9078E5
         ======
          923104
         -9A128D
          ======
           00D3D

base: 15
letters: 0123456789ABCDE
difficulty: hard