JHH
      +---------
NMTGP | PCMCTTNN
       -PJYWCJ
        ======
         NMGHMN
        -MHPTTH
         ======
          NWJCTN
         -MHPTTH
          ======
           GPYHT

base: 11
letters: CGHJMNPTWXY
difficulty: intermediate
restrictions: no multiplication
missing: X