#include <iostream>
#include <string>
#include <map>
#include <vector>
/*#include <ctype.h>*/

using namespace std;

vector<int> reg;
map<char,int> L;
map<string,int> PL;

string numToRome (int n){
//Cislo n prepise na rimske cislo
	string r="";	
	/*cout<< n;*/
	while (n>0) {
		if (n>=1000) { r+="M";n-=1000;} else 
		if (n>=900) { r+="CM";n-=900;} else 
		if (n>=500) { r+="D";n-=500;} else 
		if (n>=400) { r+="CD";n-=400;} else 
		if (n>=100) { r+="C";n-=100;} else
		if (n>=90) { r+="XC";n-=90;} else
		if (n>=50) { r+="L";n-=50;} else
		if (n>=40) { r+="XL";n-=40;} else
		if (n>=10) { r+="X";n-=10;} else
		if (n>=9) { r+="IX";n-=9;} else
		if (n>=5) { r+="V";n-=5;} else
		if (n>=4) { r+="IV";n-=4;} else
		if (n>=1) { r+="I";n-=1;} 
		
	}
	return r;
}

 int romeToNum (string s){
//rimske cislo s prepise na cislo
	 int n;
	 
	 return n;
}

void reset() {
	reg.assign(10,10001);
	cout<<"Ready"<<endl;
}

int main ( int argc, char**argv ) {
	L.insert(make_pair('M',1000));
	L.insert(make_pair('D',500));
	L.insert(make_pair('C',100));
	L.insert(make_pair('L',50));
	L.insert(make_pair('X',10));
	L.insert(make_pair('V',5));
	L.insert(make_pair('I',1));
	L.insert(make_pair('O',0));
	
	PL.insert(make_pair("IV",4));
	PL.insert(make_pair("IX",9));
	PL.insert(make_pair("XL",40));
	PL.insert(make_pair("XC",90));
	PL.insert(make_pair("CD",400));
	PL.insert(make_pair("CM",900));
	
	reg.assign(10,10001);//reset();
	
	string line;
	cin>>line;
	while( line!="QUIT") {
		if (line=="RESET") reset(); else {
		
		int areg;
		if (line[1]=='=') {
			switch (line[0])  {
				case '1': 
					areg=1;
					break;
				case '2': 
					areg=2;
					break;
				case '3': 
					areg=3;
					break;
				case '4': 
					areg=4;
					break;
				case '5': 
					areg=5;
					break;
				case '6': 
					areg=6;
					break;
				case '7': 
					areg=7;
					break;
				case '8': 
					areg=8;
					break;
				case '9': 
					areg=9;
					break;
				case '0': 
					areg=0;
					break;
				default: cout<<"Error"<<endl;
			}
			
			
			int vysl=0;
			int znam=1;
			int hod=0;
			
			for (int i=2; i < (int)line.size(); i++) {
				hod=0;
				
				if (isdigit(line[i])) {
					hod=reg[line[i]-'0'];
					if (hod==10001) {break;}
					i++;
				} else {	
					/*cout<< line[i];*/
					while ( i < (int)line.size() && line[i]!='+' && line[i]!='-' /*&& (isalpha(line[i]))*/ ) {
							int a = L.find(line[i])->second;
							int b= 0;
							if ( i+1<(int)line.size() && line[i+1]!='+' && line[i+1]!='-')  b= L.find(line[i+1])->second;
							if (a >= b) {
								hod+=a;
							} else {
								hod-=a;
							}
							i++;
					}
				}
				
				vysl+=znam*hod;
				/*cout<< " vysl: "<<vysl << line[i];*/
				
				if ( line[i]=='+' ) znam=1;
				if ( line[i]=='-' ) znam=-1;
				
			}
			
			
			if (hod==10001 || vysl>10000 || vysl <0) cout<<"Error"<<endl; else {
				reg[areg]=vysl;
				cout << areg << "=" << numToRome(vysl) <<endl;
			}
			
		} else cout <<"Error"<<endl;
			/*cout << line[0] << line[1]<<endl;*/
	}	
		cin>>line;
	}
	cout<<"Bye"<<endl;
	return 0;
}