????????
      +---------
EMPRH | RPREPLRC
       -EMPRH
        =====
        MJFCJL
       -MEFUFQ
        ======
         HUQFCR
        -MLCEJH
         ======
          HCJWHC
         -HQJFLQ
          ======
          ??????

base: 12
letters: CEFHJLMPQRUW
difficulty: medium