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

int reg[1000];


char *pre[3][10]={{"","C","CC","CCC","CD","D","DC","DCC","DCCC","CM"},{"","X","XX","XXX","XL","L","LX","LXX","LXXX","XC"},{"","I","II","III","IV","V","VI","VII","VIII","IX"}};

void printf_rom(int n)
{
	if (n==0) {
		printf("O");
		return ;
	}
	
	int i;
	for (i=0;i<n/1000;i++)
		putchar('M');
	n%=1000;
	printf("%s",pre[0][n/100]);
	n%=100;
	printf("%s",pre[1][n/10]);
	n%=10;
	printf("%s",pre[2][n]);

}

int get_value(char **pstr)
{
	char *str=*pstr;
	int n=0;
	
	
	if (isalpha(*str)) {
		while (isalpha(*str)) {
			switch (*str) {
			case 'I': if (str[1]=='V') n+=4; else {if (str[1]=='X') n+=9; else {--str; n+=1;}}
				++str;
				break;
			case 'O': n+=0;
				break;
			case 'V': n+=5;
				break;
			case 'X': if (str[1]=='L') n+=40; else {if (str[1]=='C') n+=90; else {--str;n+=10;}}
				++str;
				break;
			case 'L': n+=50;
				break;
			case 'C': if (str[1]=='D') n+=400; else {if (str[1]=='M') n+=900; else {--str;n+=100;}}
				++str;
				break;
			case 'D': n+=500;
				break;
			case 'M': n+=1000;
				break;
			}
			++str;
		}
		*pstr=str;
		return n;
		
	} else {
		while (isdigit(*str)) {
			n=n*10+(*str-'0');
			++str;
		}
		*pstr=str;
		return reg[n];
	}
}


void reset()
{
	
	int i;
	for (i=0;i<1000;i++) {
		reg[i]=-1000000000;
	}
	
}

int main()
{
	char _line[100000],*line=_line;
	
	int i;


	reset();

	
		while (1) {
	line=_line;
			gets(line);
	
	if (!strcmp("RESET",line)) {
		reset();
		printf("Ready\n");
	} else if (!strcmp("QUIT",line)) {
		printf("Bye\n");
		break;
	}else {
	
		char sign;
		
		//printf(line);
		


		int nreg=0;

		while (isdigit(*line)) {
			nreg=nreg*10+(*line-'0');
			++line;
		}

		++line;
		//printf(line);
		int vysl=0;
		int tmp;



		
		vysl=get_value(&line);
		
		while (1) {
		//printf(line);
			if (*line=='+')
				sign='+';
			else if (*line=='-')
				sign='-';
			else
				break;
			++line;
			
			tmp=get_value(&line);
			//printf("%d\n",tmp);
			if (sign=='+')
				vysl+=tmp;
			else
				vysl-=tmp;
		}
		
		if (vysl<0 || vysl>10000)
			printf("Error\n");
		else {
			printf("%d=",nreg);
			printf_rom(vysl);
			reg[nreg]=vysl;
			printf("\n");
		}
	}
	}
	
	
	return 0;
}