HMWM
      ----------
PNNCR ) XNCRWMCX
       -MNNXH
        =====
        HNPPTM
       -RXNHCM
        ======
         HPRRNC
        -HRNHXW
         ======
          HNXRWX
         -RXNHCM
          ======
           HWYPH

base: 10
symbols: CHMNPRTWXY
difficulty: intermediate
restrictions: no multiplication