????????
      ----------
LPXMY ) MTHLEYWT
       -TEMWX
        =====
        RPETWY
       -RUTTEM
        ======
         RMUPPW
        -RLYWHT
         ======
          LUQXYT
         -HXWYRR
          ======
          ??????

base: 12
symbols: EHLMPQRTUWXY
difficulty: medium