????????
      +---------
HCCYP | QFHWUYLM
       -LFPJU
        =====
         QCPUY
        -LFPJU
         =====
          LQFYL
         -LFPJU
          =====
           HQMLM
          -HCCYP
           =====
           ?????

base: 12
letters: CFHJLMPQTUWY
missing: T
difficulty: medium