GMJ
     +-------
GLLX | FXMHEX
      -EGCP
       ====
       LEEHE
      -LGMYX
       =====
        LHJYX
       -LXYLX
        =====
         LUJP

base: 12
letters: CEFGHJLMPUXY
difficulty: hard
hints: H << J
missing: U