????????
      ----------
MJMJJ ) RJFUHYRG
       -MJMJJ
        =====
        UNRGTY
       - TPTTP
        ======
         UHHXRR
        -UWHWLG
         ======
          MNFQXG
         -MNUNMP
          ======
          ??????

base: 15
symbols: FGHJLMNPQRTUWXY
difficulty: medium
hints: L << J