????????
      +---------
TRMLR | RQTQTMFT
       -TRMLR
        =====
        YQLTLM
       -FGRFFT
        ======
         YGFYYF
        -YFRWRY
         ======
          YYFYRT
         -YFRWRY
          ======
          ??????

base: 9
letters: FGLMQRTWY
difficulty: medium