QWRT
      +---------
XWYQH | MFRHNNPM
       -NWPGU
        =====
        XWTYRN
       -XYYPTM
        ======
         XMPPFP
        -XPYWHF
         ======
           HMTHM
          -MWQWL
           =====
            HJUN

base: 15
letters: FGHJLMNPQRTUWXY
difficulty: medium
missing: J