nsystem.cpp

// 2008-04-20
#include <iostream>
#include <string>
using namespace std;
int val(string s)
{
	int result=0;
	int i;
	for (i=0; i<s.length(); i++)
	{
		if (s[i]<='9')
		{
			if (s[i+1]=='i')
				result+=int(s[i]-48);
			else if (s[i+1]=='x')
				result+=10*int(s[i]-48);
			else if (s[i+1]=='c')
				result+=100*int(s[i]-48);
			else
				result+=1000*int(s[i]-48);
			i++;
		}
		else
			if (s[i]=='i')
				result+=1;
			else if (s[i]=='x')
				result+=10;
			else if (s[i]=='c')
				result+=100;
			else
				result+=1000;
	}
	return result;
}
string str(int x)
{
	string result="";
	if (x>=2000)
		result=result+char(x/1000+48)+'m';
	else if (x>=1000)
		result=result+'m';
	x%=1000;
	if (x>=200)
		result=result+char(x/100+48)+'c';
	else if (x>=100)
		result=result+'c';
	x%=100;
	if (x>=20)
		result=result+char(x/10+48)+'x';
	else if (x>=10)
		result=result+'x';
	x%=10;
	if (x>=2)
		result=result+char(x+48)+'i';
	else if (x>=1)
		result=result+'i';
	return result;
}
int main()
{
	int n,i;
	string s1,s2;
	cin >> n;
	for (i=0; i<n; i++)
	{
		cin >> s1 >> s2;
		cout << str(val(s1)+val(s2)) << endl;
	}
	return 0;
}