XRLT
      +---------
QXGNQ | NTLLTJTT
       -QXGNQ
        =====
        XGUPUJ
       -XWRYHW
        ======
         RNFTYT
        -RHGTFH
         ======
          LHJJXT
         -LWQQJW
          ======
           WGLRL

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