#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#define APPEND(c,str) (*((str)++)) = (c);

void val(int *num, int chrval, char chr, char **str)
{
	int n = *num;
	while(n >= chrval) {
		APPEND(chr, *str);
		n -= chrval;
		*num = n;
	}
	*num = n;
}

void check(int *num, int chrval, char chr1, char chr2, char **str)
{
	if (*num >= chrval) {
		*num -= chrval;
		APPEND(chr1, *str);
		APPEND(chr2, *str);
	}
}

void to_roman(int num, char *str)
{
	val(&num, 1000, 'M', &str);
	check(&num, 900, 'C', 'M', &str);
	val(&num, 500, 'D', &str);
	check(&num, 400, 'C', 'D', &str);
	val(&num, 100, 'C', &str);
	check(&num, 90, 'X', 'C', &str);
	val(&num, 50, 'L', &str);
	check(&num, 40, 'X', 'L', &str);
	val(&num, 10, 'X', &str);
	check(&num, 9, 'I', 'X', &str);
	val(&num, 5, 'V', &str);
	check(&num, 4, 'I', 'V', &str);
	val(&num, 1, 'I', &str);
	*str = 0;
}

int valofchar(char c) 
{
	switch(c) {
		case 'I' : return 1;
		case 'V' : return 5;
		case 'X' : return 10;
		case 'L' : return 50;
		case 'C' : return 100;
		case 'D' : return 500;
		case 'M' : return 1000;
	}
	return 0;
}

int to_a(char *str)
{
	int l = strlen(str);
	int t;
	int last = 0;
	int sum = 0;
	for(t=l-1;t>=0;--t) {
		int v = valofchar(str[t]);
		if (last > v) 
			sum -= v;
		else
			sum += v;
		last = v;
	}
	return sum;
}

int reg[10];

void reset() 
{
	int t;
	for (t=0;t<10;t++) {
		reg[t] = -1;
	}
}

int err;

int token(char **str) 
{
	char first = **str;

	int plus = 1;
	if (first == '+') {
		(*str)++;
		first = **str;
	}
	if (first == '-') {
		plus = 0;
		(*str) ++;
		first = **str;
	}


	if (isdigit(first)) {
		(*str) ++;
		int r = reg[first - '0'];
		if (r == -1) {
			err = 1;
			return 0;
		}
		return plus?r:-r;
	}


	char tmp[50000];
	int pos = 0;
	while(isalpha(**str)) 
	{
		tmp[pos++] = **str;
		(*str)++;
	}
	tmp[pos] = 0;
	int vv = to_a(tmp);
	return plus?vv:-vv;
}

int main()
{
	reset();
	
	char line[50000];

	for(;;) {
		err = 0;
		fgets(line, 50000, stdin);
		if (line[0] == 'Q') {
			printf("Bye\n");
			return 0;
		}
		if (line[0] == 'R') {
			reset();
			printf("Ready\n");
			continue;
		}
		int r = line[0] - '0';
		char *str = line + 2;
		int sum = 0;
		while( *str != '\n') {
			sum += token(&str);
			if (err) 
				break;
		}
		if (err || sum < 0 || sum > 10000) {
			printf("Error\n");
			continue;
		}
		char tmp[50000];
		to_roman(sum, tmp);
		printf("%c=%s\n",line[0], tmp);
		reg[r] = sum;

	}
}