QCX
      +--------
CLQFF | MGTQMFX
       -CLQFF
        =====
        XXFEUF
       -XLUHHF
        ======
         LEEUHX
        -LXFGTF
         ======
           FFQF

base: 12
letters: CEFGHLMNQTUX
difficulty: medium
missing: N