????????
      ----------
LRTWY ) PCRURCPW
       -LRTWY
        =====
        WHXHLC
       -WRCUHL
        ======
          ECTPP
         -YEEXW
          =====
          UNEUTW
         - HYNYC
          ======
          ??????

base: 12
symbols: CEHLNPRTUWXY
difficulty: medium