???????
     +--------
LYFL | GEEFCYX
      -EFGE
       ====
       HHEEC
      - EFGE
       =====
        LHEUY
       -YGXCU
        =====
         YNHNX
        -YLGLY
         =====
         ?????

base: 11
letters: CEFGHLNQUXY
missing: Q
difficulty: medium