NMJ
      +--------
XUWQH | HTPXJHM
       -GHWMN
        =====
        NZPPYH
       -NUGJVX
        ======
         XTLZGM
        -NJVQQJ
         ======
          XUHPQ

base: 16
letters: GHJLMNPQRTUVWXYZ
difficulty: challenging
attributes: delightful, long
missing: R