????????
      ----------
PJWYP ) MXJUYPXY
       -PJWYP
        =====
        PMQPQP
       -PMPJPJ
        ======
          HHHHX
         -PJWYP
          =====
          URXMUY
         -UHWHRW
          ======
          ??????

base: 10
symbols: HJMPQRUWXY
difficulty: hard