#include <stdio.h>

int main() {
   char s[10001];
   while (scanf("%[^\n]",s)) {
      int EndMM,EndCM;
      int EndMD,EndCD;
      int EndMC,EndDC,EndCC,EndCCC,EndXC;
      int EndNXL,EndXL;
      int EndLX,EndNINLX,EndXX,EndXXX,EndIX;
      int EndNIV,EndIV;
      int EndNVI,EndVI,EndII,EndIII;
      EndMM=0;
      EndCM=EndMD=EndCD=EndMC=EndDC=EndCC=EndCCC=EndXC=EndNXL=EndXL=EndLX=EndNINLX=EndXX=EndXXX=EndIX=EndNIV=EndIV=EndNVI=EndVI=EndII=EndIII=-1; 
      int Ev;
      int i;      
      for (i=0;s[i]!=0;i++) {switch (s[i]) {
      case 'm':
         if (EndMM != -1) EndMM = EndMM+1000;
	 if (EndMC != -1) EndCM = EndMC+800;
	 break;
      case 'd':
         if (EndMM != -1) EndMD = EndMM + 500;
	 if (EndMC != -1) EndCD = EndMC + 300;
	 break;
      case 'c':
	 if (EndCC != -1) EndCCC =  EndCC + 100;
	 Ev = -1;
	 if (EndMC != -1) Ev = EndMC;
	 if (EndDC != -1) Ev = ((Ev > EndDC) ? Ev : EndDC);
	 if (Ev != -1) EndCC = Ev + 100;
         if (EndMM != -1) EndMC = EndMM + 100;
	 if (EndMD != -1) EndDC = EndMD + 100;
	 if (EndNINLX != -1) EndXC = EndNINLX + 80;
	 break;
      case 'l':
         if (EndNINLX != -1) EndXL = EndNINLX + 30;
	 Ev = -1;
	 if (EndMM != -1) Ev = EndMM;
	 if (EndCM != -1) Ev = (Ev > EndCM) ? Ev : EndCM;
	 if (EndMD != -1) Ev = (Ev > EndMD) ? Ev : EndMD;
	 if (EndCD != -1) Ev = (Ev > EndCD) ? Ev : EndCD;
	 if (EndMC != -1) Ev = (Ev > EndMC) ? Ev : EndMC;
	 if (EndDC != -1) Ev = (Ev > EndDC) ? Ev : EndDC;
	 if (EndCC != -1) Ev = (Ev > EndCC) ? Ev : EndCC;
	 if (EndCCC != -1) Ev = (Ev > EndCCC) ? Ev : EndCCC;
	 if (Ev != -1) EndNXL = Ev + 50;
	 break;
      case 'x':
	 if (EndXX != -1) EndXXX = EndXX + 10;
	 Ev = -1;
	 if (EndNINLX != -1) Ev = EndNINLX;
	 if (EndLX != -1) Ev = (Ev > EndLX) ? Ev : EndLX;
	 if (Ev != -1) EndXX = Ev + 10;
         if (EndNXL != -1) EndLX = EndNXL + 10;
	 if (EndMM != -1) Ev = EndMM;
	 if (EndCM != -1) Ev = (Ev > EndCM) ? Ev : EndCM;
	 if (EndMD != -1) Ev = (Ev > EndMD) ? Ev : EndMD;
	 if (EndCD != -1) Ev = (Ev > EndCD) ? Ev : EndCD;
	 if (EndMC != -1) Ev = (Ev > EndMC) ? Ev : EndMC;
	 if (EndDC != -1) Ev = (Ev > EndDC) ? Ev : EndDC;
	 if (EndCC != -1) Ev = (Ev > EndCC) ? Ev : EndCC;
	 if (EndCCC != -1) Ev = (Ev > EndCCC) ? Ev : EndCCC;
	 if (Ev != -1) EndNINLX = Ev + 10;
	 if (EndNVI != -1) EndIX = EndNVI + 8;
	 break;
      case 'v':
         if (EndNVI != -1) EndIV = EndNVI + 3;
	 Ev = -1;
	 if (EndMM != -1) Ev = EndMM;
	 if (EndCM != -1) Ev = (Ev > EndCM) ? Ev : EndCM;
	 if (EndMD != -1) Ev = (Ev > EndMD) ? Ev : EndMD;
	 if (EndCD != -1) Ev = (Ev > EndCD) ? Ev : EndCD;
	 if (EndMC != -1) Ev = (Ev > EndMC) ? Ev : EndMC;
	 if (EndDC != -1) Ev = (Ev > EndDC) ? Ev : EndDC;
	 if (EndCC != -1) Ev = (Ev > EndCC) ? Ev : EndCC;
	 if (EndCCC != -1) Ev = (Ev > EndCCC) ? Ev : EndCCC;
	 if (EndXC != -1) Ev = (Ev > EndXC) ? Ev : EndXC;
	 if (EndNXL != -1) Ev = (Ev > EndNXL) ? Ev : EndNXL;
	 if (EndXL != -1) Ev = (Ev > EndXL) ? Ev : EndXL;
	 if (EndLX != -1) Ev = (Ev > EndLX) ? Ev : EndLX;
	 if (EndNINLX != -1) Ev = (Ev > EndNINLX) ? Ev : EndNINLX;
	 if (EndXX != -1) Ev = (Ev > EndXX) ? Ev : EndXX;
	 if (EndXXX != -1) Ev = (Ev > EndXXX) ? Ev : EndXXX;
	 if (Ev != -1) EndNIV = Ev + 5;
	 break;
      case 'i':
	 if (EndII != -1) EndIII = EndII + 1;
	 Ev = -1;
	 if (EndVI != -1) Ev = EndVI;
	 if (EndNVI != -1) Ev = (Ev > EndNVI) ? Ev : EndNVI;
	 if (Ev != -1) EndII = Ev + 1;
         Ev = -1;
	 if (EndMM != -1) Ev = EndMM;
	 if (EndCM != -1) Ev = (Ev > EndCM) ? Ev : EndCM;
	 if (EndMD != -1) Ev = (Ev > EndMD) ? Ev : EndMD;
	 if (EndCD != -1) Ev = (Ev > EndCD) ? Ev : EndCD;
	 if (EndMC != -1) Ev = (Ev > EndMC) ? Ev : EndMC;
	 if (EndDC != -1) Ev = (Ev > EndDC) ? Ev : EndDC;
	 if (EndCC != -1) Ev = (Ev > EndCC) ? Ev : EndCC;
	 if (EndCCC != -1) Ev = (Ev > EndCCC) ? Ev : EndCCC;
	 if (EndXC != -1) Ev = (Ev > EndXC) ? Ev : EndXC;
	 if (EndNXL != -1) Ev = (Ev > EndNXL) ? Ev : EndNXL;
	 if (EndXL != -1) Ev = (Ev > EndXL) ? Ev : EndXL;
	 if (EndLX != -1) Ev = (Ev > EndLX) ? Ev : EndLX;
	 if (EndNINLX != -1) Ev = (Ev > EndNINLX) ? Ev : EndNINLX;
	 if (EndXX != -1) Ev = (Ev > EndXX) ? Ev : EndXX;
	 if (EndXXX != -1) Ev = (Ev > EndXXX) ? Ev : EndXXX;
         if (Ev != -1) EndNVI = Ev + 1;
	 if (EndNIV != -1) EndVI = EndNIV + 1;
	 break;
      };
/*         printf("MM%dCM%dMD%dCD%dMC%dDC%dCC%dCCC%dXC%d\n",EndMM,EndCM,EndMD,EndCD,EndMC,EndDC,EndCC,EndCCC,EndXC);*/
      };
      Ev = (EndMM > EndCM) ? EndMM : EndCM;
      Ev = (Ev > EndMD) ? Ev : EndMD;
      Ev = (Ev > EndCD) ? Ev : EndCD;
      Ev = (Ev > EndMC) ? Ev : EndMC;
      Ev = (Ev > EndDC) ? Ev : EndDC;
      Ev = (Ev > EndCC) ? Ev : EndCC;
      Ev = (Ev > EndCCC) ? Ev : EndCCC;
      Ev = (Ev > EndXC) ? Ev : EndXC;
      Ev = (Ev > EndNXL) ? Ev : EndNXL;
      Ev = (Ev > EndXL) ? Ev : EndXL;
      Ev = (Ev > EndLX) ? Ev : EndLX;
      Ev = (Ev > EndNINLX) ? Ev : EndNINLX;
      Ev = (Ev > EndXX) ? Ev : EndXX;
      Ev = (Ev > EndXXX) ? Ev : EndXXX;
      Ev = (Ev > EndIX) ? Ev : EndIX;
      Ev = (Ev > EndNIV) ? Ev : EndNIV;
      Ev = (Ev > EndIV) ? Ev : EndIV;
      Ev = (Ev > EndNVI) ? Ev : EndNVI;
      Ev = (Ev > EndVI) ? Ev : EndVI;
      Ev = (Ev > EndII) ? Ev : EndII;
      Ev = (Ev > EndIII) ? Ev : EndIII;
      printf("%d\n",Ev);
   };
   return 0;
};