LLX
      +--------
NHQLW | JTMLXRG
       -NHQLW
        =====
         GHUUR
        -NHQLW
         =====
         YFWGTG
        -QWUNFF
         ======
          QTYTG

base: 15
letters: FGHJLMNPQRTUWXY
difficulty: hard
missing: P