/* 19:07 - 19:24 */
#include <stdio.h>

int decode(char s[1024])
{
  int result = 0, len, i, radix = 0, coeff = 0;
  len = strlen(s);
  for (i = len - 1; i >= 0; i--) {
    if (s[i] == 'i') { result += radix * coeff; radix = 1; coeff = 1; }
    else if (s[i] == 'x') { result += radix * coeff; radix = 10; coeff = 1; }
    else if (s[i] == 'c') { result += radix * coeff; radix = 100; coeff = 1; }
    else if (s[i] == 'm') { result += radix * coeff; radix = 1000; coeff = 1; }
    else { coeff = s[i] - '0'; }
  }
  return result + radix * coeff;
}

int radix_char(int radix)
{
  if (radix == 1000) { return 'm'; }
  if (radix == 100) { return 'c'; }
  if (radix == 10) { return 'x'; }
  if (radix == 1) { return 'i'; }
  return '*';
}

void encode(int x, char s[1024])
{
  int si = 0, radix;
  for (radix = 1000; radix >= 1; radix /= 10) {
    if (x / radix == 0) { continue; }
    else if (x / radix == 1) { s[si] = radix_char(radix); si++; }
    else { s[si] = (x / radix) + '0'; si++; s[si] = radix_char(radix); si++; }
    x %= radix;
  }
  s[si] = '\0';
  return;
}

int main()
{
  int I, N, sum;
  char s1[1024], s2[1024], result[1024];
  scanf("%d", &N);
  for (I = 0; I < N; I++) {
    scanf("%s %s", s1, s2);
    sum = decode(s1) + decode(s2);
    encode(sum, result);
    printf("%s\n", result);
  }
  return 0;
}