2141
      +---------
1D3B7 | A3A08DA4
       -065EC
        =====
         05E8D
        -68FD7
         =====
         D4A29A
        -D41307
         ======
           6EE34
          -68FD7
           =====
            8A18

base: 16
letters: 0123456789ABCDEF
difficulty: hard