#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int parser(char *vst) {
int ret=0, i=0, poz = 0, poc = 0;
/*M*/
while (vst[i] != '\0') {
    if (vst[i] == 'm') {
	ret += 1000;
	poz = i;
    }
    i++;
}
i = poz;
while (vst[i] != '\0') {
    if (vst[i] == 'd') {
	ret += 500;
	poz = i;
	break;
    }
    i++;
}
i = poz;
poc = 0;
while ((vst[i] != '\0') && (poc < 3)) {
    if (vst[i] == 'c') {
	ret += 100;
	poz = i;
	poc ++;
    }
    i++;
}

i = poz;
poc = 0;
while (vst[i] != '\0') {
    if (vst[i] == 'l') {
	ret += 50;
	poz = i;
	break;
    }
    i++;
}

i = poz;
poc = 0;
while ((vst[i] != '\0') && (poc < 3)) {
    if (vst[i] == 'x') {
	ret += 10;
	poz = i;
	poc ++;
    }
    i++;
}

i = poz;
poc = 0;
while (vst[i] != '\0') {
    if (vst[i] == 'v') {
	ret += 5;
	poz = i;
	break;
    }
    i++;
}

i = poz;
poc = 0;
while ((vst[i] != '\0') && (poc < 3)) {
    if (vst[i] == 'i') {
	ret += 1;
	poz = i;
	poc ++;
    }
    i++;
}
return ret;

    while (vst[i] != '\0') {
/*	if(vst[i] == 'I' && vst[i+1] == 'V') {
	    ret += 4;
	    i += 2;
	}
	if(vst[i] == 'I' && vst[i+1] == 'X') {
	    ret += 9;
	    i += 2;
	    continue;
	}
	if(vst[i] == 'I' && vst[i+1] == 'X') {
	    ret += 9;
	    i += 2;
	    continue;
	}
	if(vst[i] == 'X' && vst[i+1] == 'L') {
	    ret += 40;
	    i += 2;
	    continue;
	}if(vst[i] == 'X' && vst[i+1] == 'C') {
	    ret += 90;
	    i += 2;
	    continue;
	}if(vst[i] == 'C' && vst[i+1] == 'D') {
	    ret += 400;
	    i += 2;
	    continue;
	}
	if(vst[i] == 'C' && vst[i+1] == 'M') {
	    ret += 900;
	    i += 2;
	    continue;
	}
*/

	if(vst[i] == 'I') {
	    ret += 1;
	    i += 1;
	    continue;
	}

	if(vst[i] == 'V') {
	    ret += 5;
	    i += 1;
	    continue;
	}

	if(vst[i] == 'X') {
	    ret += 10;
	    i += 1;
	    continue;
	}
	if(vst[i] == 'L') {
	    ret += 50;
	    i += 1;
	    continue;
	}
	if(vst[i] == 'M') {
	    ret += 1000;
	    i += 1;
	    continue;
	}

	if(vst[i] == 'D') {
	    ret += 500;
	    i += 1;
	    continue;
	}

	if(vst[i] == 'C') {
	    ret += 100;
	    i += 1;
	    continue;
	}
    }
return ret;
}

int main(void) {
char *vst; vst = (char *) malloc (10000);
while ((gets(vst)) != NULL) {
    printf("%d\n",parser (vst));
}
return 0;
}