#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char radek[10020];
char vystup[10002000];

long long reg[11], puv;

int prevod[] = {
	['I'] = 1,
	['V'] = 5,
	['X'] = 10,
	['L'] = 50,
	['C'] = 100,
	['D'] = 500,
	['M'] = 1000,
	['I' + 100*'V'] = 4,
	['I' + 100*'X'] = 9,
	['X' + 100*'L'] = 40,
	['X' + 100*'C'] = 90,
	['C' + 100*'D'] = 400,
	['C' + 100*'M'] = 900
};

void reset(){
	int i;
	for(i = 0; i < 11; i++ ) reg[i] = -1;
}

long long parse(char *start, int op){
	long long ret = 0; char *end; int regnum;
	/*printf("parsing %s\n", start);-*/
	if( start[0] == 0 ) {
		return 0;
	} else if(start[0] == 'O') {
		return parse(start + 1, 1);
 	} else if( start[1] && prevod[ start[0] + start[1] * 100 ] ){
		return op * prevod[ start[0] + start[1] * 100 ] + parse( start+2, op);
	} else if ( prevod[ start[0] ] ) {
		return op * prevod[ start[0] ] + parse( start + 1, op);
	} else if ( start[0] == '+' ){
		return op*parse( start + 1, +1 );
	} else if ( start[0] == '-' ){
		return op*parse( start + 1, -1 );
	} else {
		regnum = strtol(start, &end, 10);
		/* printf("ctu %d\n", regnum);*/
		if( reg[ regnum ] == -1 )
			return -200000000;
		return op*reg[ regnum ] + parse(end, +1);
	}
}

void vypis(int regnum){
	char *pis = vystup; 
	long long cislo = reg[regnum];
	if( cislo == 0 ){
		printf("%d=O\n", regnum);
		return;
	}
	if( cislo > 10000 ){
		reg[ regnum ] = puv;
		printf("Error\n");
		return;
	}

	while( cislo >= 1000 ){
		*(pis++) = 'M';
		cislo -= 1000;
	}
	while( cislo >= 900 ){
		*(pis++) = 'C';
		*(pis++) = 'M';
		cislo -= 900;
	}
	while( cislo >= 500 ){
		*(pis++) = 'D';
		cislo -= 500;
	}
	while( cislo >= 400 ){
		*(pis++) = 'C';
		*(pis++) = 'D';
		cislo -= 400;
	}
	while( cislo >= 100 ){
		*(pis++) = 'C';
		cislo -= 100;
	}
	while( cislo >= 90 ){
		*(pis++) = 'X';
		*(pis++) = 'C';
		cislo -= 90;
	}
	while( cislo >= 50 ){
		*(pis++) = 'L';
		cislo -= 50;
	}
	while( cislo >= 40 ){
		*(pis++) = 'X';
		*(pis++) = 'L';
		cislo -= 40;
	}
	while( cislo >= 10 ){
		*(pis++) = 'X';
		cislo -= 10;
	}
	while( cislo >= 9 ){
		*(pis++) = 'I';
		*(pis++) = 'X';
		cislo -= 9;
	}
	while( cislo >= 5 ){
		*(pis++) = 'V';
		cislo -= 5;
	}
	while( cislo >= 4 ){
		*(pis++) = 'I';
		*(pis++) = 'V';
		cislo -= 4;
	}
	while( cislo >= 1 ){
		*(pis++) = 'I';
		cislo -= 1;
	}
	*pis=0;
	if( pis - vystup > 10000 ){
		reg[ regnum ] = puv;
		printf("Error\n");
	}
	else	
		printf("%d=%s\n", regnum, vystup);
}

int main(){
	int regnum; long long vys; char *start;
	reset();
	while(1){
		gets(radek);
		switch(radek[0]){
			case 'R':
				reset();
				printf("Ready\n");
				break;
			case 'Q':
				printf("Bye\n");
				return 0;
			default:
				regnum = strtol(radek, &start, 10);
				vys = parse(start+1, +1);
				if( vys >= 0 ){
					puv = reg[ regnum ];
					reg[ regnum ] = vys;
					/*printf("%d %lld\n", regnum, vys);*/
					vypis(regnum);
				}
				else {
					printf("Error\n");
				}

		}
	}
}