????????
      ----------
MHJXM ) WYHRXMYX
       -MHJXM
        =====
        MWQMQM
       -MWMHMH
        ======
          UUUUY
         -MHJXM
          =====
          RPYWRX
         -RUJUPJ
          ======
          ??????

base: 10
symbols: HJMPQRUWXY
difficulty: hard