#include <iostream>
#include <iomanip>

using namespace std;

//enum {O = 0, I = 1, V = 5, X = 10, L = 50, C}

char* buffer;
int regs[10];
char reset[] = "RESET";
char quit[] = "QUIT";
char* result;

int parseNum(int& idx){
	int ret = 0;
	char next = 'a';
	while (buffer[idx] != '+' && buffer[idx] != '-' && buffer[idx] != 0){
	switch (buffer[idx]){
	case ('O') : 
		ret +=0;
		break;
	case ('I') :
		next = buffer[idx+1];
		if (next == 'V') {ret+=4; idx++; break;}
		if (next == 'X') {ret+=9; idx++; break;}
		ret+=1;
		break;
	case ('V') : 
		ret+=5;
		break;
	case ('X') : 
		next = buffer[idx+1];
		if (next == 'L') {ret+=40; idx++; break;}
		if (next == 'C') {ret+=90; idx++; break;}
		ret+=10;
		break;
	case ('L') : 
		ret+=50;
		break;
	case ('C') : 
		next = buffer[idx+1];
		if (next == 'D') {ret+=400; idx++; break;}
		if (next == 'M') {ret+=900; idx++; break;}
		ret+=100;
		break;
	case ('D') : 
		ret+=500;
		break;
	case ('M') : 
		ret+=1000;
		break;
	}
	idx++;
	}
	--idx;
//	cout << "parse = " << ret << endl;
	return ret;
}

void print(int cislo){
	if (cislo == 0) {cout << "O"; return;}
	int pocet = 0;
	pocet = cislo/1000;
	for (int i = 0; i < pocet; i++) cout << 'M';

	cislo = cislo%1000;
	pocet = cislo/100;
	if (pocet == 4) {cout << "CD"; pocet = 0;}
	else if (pocet == 9) {cout << "CM"; pocet=0;}
	else if (pocet >= 5 ) {cout << 'D'; pocet-=5;}
	for (int i = 0; i < pocet; i++) cout << 'C';
	
	cislo = cislo%100;
	pocet = cislo/10;
	if (pocet == 4) {cout << "XL"; pocet = 0;}
	else if (pocet == 9) {cout << "XC"; pocet=0;}
	else if (pocet >= 5 ) {cout << 'L'; pocet-=5; }
	for (int i = 0; i < pocet; i++) cout << 'X';

	cislo = cislo%10;
	pocet = cislo;
	if (pocet == 4) {cout << "IV"; pocet=0;}
	else if (pocet == 9) {cout << "IX"; pocet=0;}
	else if (pocet >= 5 ) {cout << 'V'; pocet-=5;}
	for (int i = 0; i < pocet; i++) cout << 'I';
}

int main (int argc, char* argv[]){
	buffer = new char[10001];
	bool chyba = false;
	bool minus = false;
	for (int i = 0; i < 10; i++) regs[i] = -1;
	cin >> setw(10001) >> buffer;
	result = strstr(buffer, quit);
	int value = 0;
	while ( result == NULL){
		//RESET
		if ( (strstr(buffer, reset)) ){
			cout << "Ready" << endl;
			for (int i = 0; i < 10; i++) regs[i] = -1;
		}
		else{
		int regNr = atoi(&buffer[0]);if (regNr == 0) chyba = true;
//		cout << "regNr = " << regNr << endl;
		int reg2;
		for (int i = 2; i < strlen(buffer); i++){
			if (chyba) {break;}
			switch (buffer[i]){
			case ('+') : minus = false; break;
			case ('-') : minus = true; break;
			case ('1') : case ('2') : case ('3') : case ('4') : case ('5') : case ('6') :
			case ('7') : case ('8') :
			case ('9') : 
//				cout << "cislo" << endl; 
				reg2 = atoi(&buffer[i]);
				if (regs[reg2] < 0) {chyba=true; break;}
				value+= minus?(-regs[reg2]):(regs[reg2]);
				break;
			default : 
//				cout << "ROMAN" << endl; 
				value+= minus?( -parseNum(i) ):( parseNum(i) );
				break;
			}
			
		}
//		cout << "value = " << value << endl;
		if (value>10000 || value < 0 || chyba) {chyba = true; cout << "Error" << endl;}
		if (!chyba) {regs[regNr] = value;
			cout << regNr << "=";
			print(value);
			cout << endl;}
		chyba = false;
		minus = false;
		value = 0;
		}
	cin >> setw(10001) >> buffer;
	result = strstr(buffer, quit);
	}
cout << "Bye" << endl;

	return 0;
}