????????
      ----------
YLFTX ) HPGNNXFN
       -YLFTX
        =====
        NJHTMX
       -XFJJRL
        ======
         LLNTTF
        -LWMMUT
         ======
          MXLJNN
         - YLFTX
          ======
          ??????

base: 15
symbols: FGHJLMNPQRTUWXY
difficulty: medium
missing: Q