???????
      ---------
QMTNU ) GMVRNYN
       -QMTNU
        =====
        ZPYJGY
       - MWLMM
        ======
         QQXJHN
        -ZVRRWQ
         ======
         ??????

base: 16
symbols: GHJLMNPQRTUVWXYZ
difficulty: hard
hints: T << W