#include <iostream>
#include <cstdio>
#include <string>
#include <cstring>
#include <cctype>
using namespace std;

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)

int vals[300] = {0};
int to_int(const string & str)
{
	int res = 0;
	FOR(i, 0, str.size())
		if (i + 1 < str.size() && vals[str[i]] < vals[str[i+1]])
		{
			res += vals[str[i+1]] - vals[str[i]];
			++i;
		}
		else res += vals[str[i]];
	return res;
}

string to_rom(int n)
{
	if (!n) return "0";

	string out;
	while (n)
	{
		if (n >= 1000) { out += "M"; n -= 1000; }
		else if (n >= 900) { out += "CM"; n -= 900; }
		else if (n >= 500) { out += "D"; n -= 500; }
		else if (n >= 400) { out += "CD"; n -= 400; }
		else if (n >= 100) { out += "C"; n -= 100; }
		else if (n >= 90) { out += "XC"; n -= 90; }
		else if (n >= 50) { out += "L"; n -= 50; }
		else if (n >= 40) { out += "XL"; n -= 40; }
		else if (n >= 10) { out += "X"; n -= 10; }
		else if (n >= 9) { out += "IX"; n -= 9; }
		else if (n >= 5) { out += "V"; n -= 5; }
		else if (n >= 4) { out += "IV"; n -= 4; }
		else { out += "I"; --n; }
	}
	return out;
}

int reg[10];
void resetf()
{
	FOR(i, 0, 10) reg[i] = -1;
}

char temp[10047];
int main()
{
	vals['I'] = 1;
	vals['V'] = 5;
	vals['X'] = 10;
	vals['L'] = 50;
	vals['C'] = 100;
	vals['D'] = 500;
	vals['M'] = 1000;

	string quit("QUIT"), reset("RESET");
	resetf();
	while (1)
	{
		scanf("%s ", temp);
		if (temp == quit) { printf("Bye\n"); break; }
		else if (temp == reset) { resetf(); printf("Ready\n"); continue; }
		
		int r = temp[0] - '0';
		int index = 2;
		int len = strlen(temp);
		int val = 0;
		bool res = true;
		while (index < len)
		{
			string str;
			bool plus = true;
			if (temp[index-1] == '-') plus = false;
			while (index < len && temp[index] != '+' && temp[index] != '-')
				str += temp[index++];
			if (isdigit(str[0]))
			{
				if (reg[str[0]-'0'] == -1) { printf("Error\n"); res = false; break; }
				if (plus) val +=reg[str[0]-'0'];
				else val -= reg[str[0]-'0'];
			}
			else
			{
				if (plus) val += to_int(str);
				else val -= to_int(str);
			}
			++index;
		}
		if (!res) continue;
		if (val < 0 || val > 10000) printf("Error\n");
		else
		{
			reg[r] = val;
			printf("%d=%s\n", r, to_rom(val).c_str());
		}
	}

	return 0;
}