XMRM
      ----------
NHHYP ) THYPRMYT
       -MHHTX
        =====
        XHNNCM
       -PTHXYM
        ======
         XNPPHY
        -XPHXTR
         ======
          XHTPRT
         -PTHXYM
          ======
           XRWNX

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