17D
      +--------
81897 | A24BD63
       -A8B75
        =====
         98516
        -456B1
         =====
          E8573
         -D4EEC
          =====
           42E5

base: 15
letters: 0123456789ABCDE
difficulty: hard
hints: B << 5, 1 << 6
missing: 0