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

char input[10005];
int reg[10];

char *pairs[] = {"IV", "IX", "XL", "XC", "CD", "CM" };
int pairVals[] = {4,   9,    40,   90,   400,  900};
#define PAIRS 6


int rimVals[256];

#define TO_CNT 13
int toRimVals[] = {1000,900,500,400,100,90,50,40,10,9,5,4,1};
char *toRimString[] = {"M","CM","D","CD","C","XC","L","XL","X","IX", "V", "IV", "I"};

void compose(long num){
	//sprintf(input, "%ld", num );
	if( num == 0 ){
		input[0]='O';
		input[1]='\0';
		return;
	}

	input[0]='\0';
	for(int x=0;x<TO_CNT;x++){
		if(num<toRimVals[x])
			continue;
		int count = num / toRimVals[x];
		num = num % toRimVals[x];

		while( count-- )
			strcat(input, toRimString[x]);
	}
}

long decompose(int* pi){
	int i = *pi;

	if( input[i] == 'O' ){
		*pi = i + 1;
		return 0;
	}

	while(input[i]!='+' && input[i]!='-' && input[i]!='\0' )
		i++;
	char tmp = input[i];
	input[i] = '\0';

	for( int j=0; j<PAIRS; j++){
		char *pos;
		do{
			pos = strstr(&input[*pi], pairs[j]);
			if( pos != NULL )
				*pos = '0' + j;
		}while( pos != NULL );

	}

	//printf("%s\n", &input[*pi] );
	//
	
	long result=0;
	i = *pi;
	for(;input[i]!='\0'; i++ ){
		if( input[i]>='0' && input[i]<='9'){
			result += pairVals[ input[i] - '0' ];
			i++;
		}
		else{
			result += rimVals[ (int)input[i] ];	
			
		}
	}
	//printf("%d\n", result );

	input[i] = tmp;
	*pi = i;
	return result;
}

void parseLine(){
	int destRegNum;
	int i=0;
	sscanf(input, "%d=",&destRegNum);
	
	while( input[i]!='=')
		i++;
	
	long lineRes=0;
	while( input[i]!='\0' ){
		char plus = 1;
		if( input[i] == '-' )
			plus = 0;
		i++;

		long res = 0;
		if( input[i]>='1' && input[i]<='9' ){
			//register	
			int regNum;
			if( input[i+1]=='0' ){
				regNum = 10;
				i+=2;
			}
			else{
				regNum=(int)input[i]-(int)'0';
				i+=1;
			}
			if( reg[regNum-1] == -1 ){
				printf("Error\n");
				return;
			}
			res = reg[regNum-1];
				
		}
		else{
			res = decompose(&i);			
		}
		
		if( plus )
			lineRes += res;
		else 
			lineRes -= res;

	}
	
	if( lineRes<0 || lineRes>10000 ){
		printf("Error\n");
		return;
	}
	
	// ukladam do registrov
	reg[destRegNum-1] = lineRes;
	compose(lineRes); // ulozi do input
	printf("%d=%s\n", destRegNum, input );
	
}

void inline resetReg(){
	for(int i=0;i<10;i++)
		reg[i] = -1;// not set	
}

int main()
{
	resetReg();

	rimVals['O'] = 0;
	rimVals['I'] = 1;
	rimVals['V'] = 5;
	rimVals['X'] = 10;
	rimVals['L'] = 50;
	rimVals['C'] = 100;
	rimVals['D'] = 500;
	rimVals['M'] = 1000;

	while(1){
		fgets(input,10004,stdin);
		if( input[0]=='Q'){
			printf("Bye\n");
			return 0;
		}

		if( input[0]=='R'){
			resetReg();
			printf("Ready\n");
			continue;
		}

		parseLine();				
	
	}
}