37A4
      +---------
DA27C | 5AF294AE
       -2651A
        =====
        D01F34
       -DC3DAC
        ======
         D3415A
        -DF0E9B
         ======
          D178AE
         -D098E2
          ======
            4B3F

base: 16
letters: 0123456789ABCDEF
difficulty: challenging