?????????
      +----------
FRWLC | PHPFPRWWW
       -LWJJH
        =====
         YGYPR
        -FRWLC
         =====
         RPWHYW
        -RERFMH
         ======
          WGEFWW
         -MLJELC
          ======
           RJJFLW
          -RERFMH
           ======
           ??????

base: 12
letters: CEFGHJLMPRWY
difficulty: intermediate