PNRM
      +---------
LYMXR | UQLRXWTR
       -VQLRQ
        =====
        MGGGNW
       - RNUZN
        ======
         PZHTHT
        -PZPTGT
         ======
           VGHGR
          -LYMXR
           =====
           PZVPG

base: 16
letters: GHJLMNPQRTUVWXYZ
difficulty: hard
missing: J