#include<iostream>
#include<string>
using namespace std;
int main()
{
	char a[10],b[10],res[8];
	int n,i,la,lb,x1,x2,x3,x4,y1,y2,y3,y4,z1,z2,z3,z4,p1,p2,p3,p4;
	cin>>n;
	while(n--)
	{
		x1=x2=x3=x4=y1=y2=y3=y4=0;
		scanf("%s %s",a,b);
		la=strlen(a);
		lb=strlen(b);
		for(i=0;i<la;i++)
		{
			if(a[i]=='m')
			{
				if(i==0)
					x1=1;
				else
					x1=a[i-1]-48;
			}
			if(a[i]=='c')
			{
				if(i==0||a[i-1]=='m')
					x2=1;
				else
					x2=a[i-1]-48;
			}
			if(a[i]=='x')
			{
				if(i==0||a[i-1]=='m'||a[i-1]=='c')
					x3=1;
				else
					x3=a[i-1]-48;
			}
			if(a[i]=='i')
			{
				if(i==0||a[i-1]=='m'||a[i-1]=='c'||a[i-1]=='x')
					x4=1;
				else
					x4=a[i-1]-48;
			}
		}
	//	cout<<x1<<x2<<x3<<x4<<endl;
		for(i=0;i<lb;i++)
		{
			if(b[i]=='m')
			{
				if(i==0)
					y1=1;
				else
					y1=b[i-1]-48;
			}
			if(b[i]=='c')
			{
				if(i==0||b[i-1]=='m')
					y2=1;
				else
					y2=b[i-1]-48;
			}
			if(b[i]=='x')
			{
				if(i==0||b[i-1]=='m'||b[i-1]=='c')
					y3=1;
				else
					y3=b[i-1]-48;
			}
			if(b[i]=='i')
			{
				if(i==0||b[i-1]=='m'||b[i-1]=='c'||b[i-1]=='x')
					y4=1;
				else
					y4=b[i-1]-48;
			}
		}
	//	cout<<y1<<y2<<y3<<y4<<endl;
		z4=x4+y4;
		z3=x3+y3;
		z2=x2+y2;
		z1=x1+y1;
		if(z4==0||z4==10)
			p4=0;
		else if(z4>10)
			p4=z4-10;
		else 
			p4=z4;
		if(z4>=10)
			z3=z3+1;
		if(z3==0||z3==10)
			p3=0;
		else if(z3>10)
			p3=z3-10;
		else 
			p3=z3;
		if(z3>=10)
			z2=z2+1;
		if(z2==0||z2==10)
			p2=0;
		else if(z2>10)
			p2=z2-10;
		else 
			p2=z2;
		if(z2>=10)
			z1=z1+1;
		p1=z1;
	//	cout<<p1<<p2<<p3<<p4<<endl;
		res[0]=p1+48;
		res[1]='m';
		res[2]=p2+48;
		res[3]='c';
		res[4]=p3+48;
		res[5]='x';
		res[6]=p4+48;
		res[7]='i';
		for(i=0;i<7;i+=2)
		{
			if((res[i]-48)!=0&&(res[i]-48)!=1)
				cout<<res[i]<<res[i+1];		
			if((res[i]-48)==1)
				cout<<res[i+1];		
		}
		cout<<endl;
	}
	system("pause");
	return 0;
}