FTM
      +--------
YNRGW | WYMRQNG
       -QPXGY
        =====
        JTPHMN
       -JMUWNL
        ======
         JMJXNG
        -JLWNNX
         ======
          YXULU

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