????????
      +---------
LEFCL | CQFAQQGC
       -QLPGLC
        ======
         CPQQLG
        -QLPGLC
         ======
          FWGPAC
         - LEFCL
          ======
          ??????

base: 10
letters: ACEFGLPQWX
difficulty: hard
missing: X