#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define RDIGITS 14
int validateN(char c) {
  int n = (int)c;
  return c > 47 && n < 58;
}
/*
 * Returns the value of a roman numeral digit
 * @param {char} c - Roman digit
 */
static int roman_to_integer(char c) {
  switch (c) {
  case 'I':
    return 1;
  case 'V':
    return 5;
  case 'X':
    return 10;
  case 'L':
    return 50;
  case 'C':
    return 100;
  case 'D':
    return 500;
  case 'M':
    return 1000;
  default:
    return 0;
  }
}
/*
 * Returns the interger value of a roman number
 * @param {string} s - Roman number
 */
int roman_to_int(char *s) {
  int i, int_num = roman_to_integer(s[0]);

  for (i = 1; s[i] != '\0'; i++) {
    int prev_num = roman_to_integer(s[i - 1]);
    int cur_num = roman_to_integer(s[i]);
    if (prev_num < cur_num) {
      int_num = int_num - prev_num + (cur_num - prev_num);
    } else {
      int_num += cur_num;
    }
  }
  return int_num;
}
/*
 * Map of roman digits symbols and their value
 * @elem {string} sym - digit symbol
 * @elem {int} val - digit symbol
 */
typedef struct {
  char *sym;
  int val;
} numeral;
/*
 * Returns greatest numeral index
 * @elem {numeral} nu - map of roman digits symbols and their value
 * @elem {int} num - number
 */
int maxNume(numeral *nu, int num) {
  int i, index;
  for (i = 0; i < RDIGITS; i++) { // RDIGITS numerals in array
    if (nu[i].val <= num)
      index = i;
  }
  // gretest value numeral index, not greater than number
  return index;
}
/*
 * Prints roman number from integer
 * @elem {numeral} nu - map of roman digits symbols and their value
 * @elem {int} num - number
 */
void decToRoman(numeral *nu, int num) {
  int max;
  if (num != 0) {
    max = maxNume(nu, num);
    printf("%s", nu[max].sym);
    num -= nu[max].val;  // decrease number
    decToRoman(nu, num); // recursively print numerals
  }
}
/*
 * Main
 * @elem {int} argc - Argument count
 * @elem {string[]} argv - Strings array
 */
int main(int argc, char *argv[]) {
  int direction = 0;
  /*
   * 0: integer to roman (default)
   * 1: roman to integer
   */
  for (int i = 0; i < argc; i++) {
    if (strcmp(argv[i], "-r")) {
      direction = 1;
    } else {
      direction = 0;
    }
  }
  numeral nume[RDIGITS] = {{"I", 1},    {"IV", 4},     {"V", 5},   {"IX", 9},
                           {"X", 10},   {"XL", 40},    {"L", 50},  {"XC", 90},
                           {"C", 100},  {"CD", 400},   {"D", 500}, {"CM", 900},
                           {"M", 1000}, {"MMMM", 4000}};
  char str[51];
  int inputint = 0;
  switch (direction) {
  case 0:
    while (scanf("%50s", str) &&
           !feof(stdin)) // read integers and convert to roman
    {
      printf("%d\n", roman_to_int(str));
      scanf("%*[^\n]"); // discard all until newline
    }
    break;
  case 1:
    while (scanf("%9s", str) &&
           !feof(stdin)) // read roman and  convert to integers
    {
      for (int i = 0; i < strlen(str); i++) {
        if (!validateN(str[i]))
          break;
      }
      sscanf(str, "%d", &inputint);
      decToRoman(nume, inputint);
      printf("\n");
      scanf("%*[^\n]"); // discard all until newline
    }
    break;
  }
  return 0;
}