??????
    +-------
FWQ | EWPCFQ
     -PQF
      ===
      FPCC
     -FCPM
      ====
       QHNF
      -QWLE
       ====
        QPWQ
       -QNCW
        ====
        ????

base: 11
letters: CEFHLMNPQRW
difficulty: hard
missing: R