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

using namespace std;


int length;	
int memory[10];
char in[10000];
bool mem[10];



void deleteMem()
{
	for( int i = 0; i < 10; i++ )
		memory[i] = 0;
	for( int i = 0; i < 10; i++ )
		mem[i] = false;
}

int prevod( char letter )
{
	switch( letter )
	{
		case 'O': return 0;
		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;

		

	}

}




int charToInt( char a )
{
	switch(a)
	{
		case '1': return 1;
		case '2': return 2;
		case '3': return 3;
		case '4': return 4;
		case '5': return 5;
		case '6': return 6;
		case '7': return 7;
		case '8': return 8;	
		case '9': return 9;
		case '0': return 0;
		default:return -1;


	}

}



int getNumFromChar( char *maro )
{
	int lll = strlen(maro)-1;
	int *pole = new int[lll+1];
	for (int i=0; i<= lll; i++)
		pole[i] = prevod(maro[i]);
	
	int temp=0;
	for (int i=0; i<=lll; i++)
		temp = pole[i]+temp;

        for (int i=0; i<=lll-1; i++)
		if (pole[i]<pole[i+1])
			temp = temp - 2*pole[i];

	return temp;
}

void prekladac()
{
	int state = 0;
	int index = 0;
	int num = 0;
	int temp = 0;
	char str[10000] = "\0";
	bool failed = false;

	if(in[0] == 'Q') 
	{
		printf("Bye\n");
		exit(0);
	}		
	else if( in[0] == 'R' )
	{
		printf("Ready\n");
		deleteMem();			
		return;
	}
	else
	{	
		index = charToInt( in[0] );
		
	}

	int a = 2;
	if( in[2] == '-' )
	{
		a= 3;
		state = 2;

	}
	
	for( int i = a; i < length; i++ )
	{
	
		if( state == 0 ) // nic
		{
			if( charToInt( in[i] ) == -1 )
			{
				int l = i;
				while( charToInt( in[l] ) == -1 )
				{
					if( l > length )
						break;
					str[l-i] = in[l];
					l++;
					if( in[l] == '+' || in[l] == '-' )
						break;
				}	
				str[l] = '\0';	
				i = l-1;
				temp += getNumFromChar(str);
			}
			else
			{
				if( mem[charToInt( in[i] )] )
					temp += memory[charToInt( in[i] )];
				else
				{
					failed = true;
					break;
				}
			}
			state = 1;

		}
		else if( state == 1 )
		{
			if( in[i] == '-' )
				state = 2;
			else
				state = 0;
		}
		else if( state == 2 ) // nic
		{
			if( charToInt( in[i] ) == -1 )
			{
				int l = i;
				while( charToInt( in[l] ) == -1 )
				{
					if( l > length )
						break;
					str[l-i] = in[l];
					l++;
					if( in[l] == '+' || in[l] == '-' )
						break;
				}		
				i = l-1;
				str[l] = '\0';
				temp -= getNumFromChar(str);
			}
			else
			{
				if( mem[charToInt( in[i] )] )
					temp -= memory[charToInt( in[i] )];
				else
				{
					failed = true;
					break;
				}
			}
			state = 1;
			
		}
		
		
		
		


	} 


		if( temp > 10000 )
			failed = true;
		else if( temp < 0 )
			failed = true;

	if( failed )
	{
		printf("Error\n");
	}
	else
	{
		memory[index] = temp;
		mem[index] = true;
		printf("%i=", index );

		int aaa = memory[index];
		
		if( aaa == 0 )
			printf("0");
		else
		while( aaa > 0 )
		{
			if( aaa >= 1000 )
			{
				printf("M");
				aaa -= 1000;
			}
			else if( aaa >= 900 )
			{
				printf("CM");
				aaa -= 900;
			}
			else if( aaa >= 500 )
			{
				printf("D");
				aaa -= 500;
			}

			else if( aaa >= 400 )
			{
				printf("CD");
				aaa -= 400;
			}

			else if( aaa >= 100 )
			{
				printf("C");
				aaa -= 100;
			}

			else if( aaa >= 90 )
			{
				printf("XC");
				aaa -= 90;
			}
			else if( aaa >= 50 )
			{
				printf("L");
				aaa -= 50;
			}
			else if( aaa >= 40 )
			{
				printf("XL");
				aaa -= 40;
			}

			else if( aaa >= 10 )
			{
				printf("X");
				aaa -= 10;
			}

			else if( aaa >= 9 )
			{
				printf("IX");
				aaa -= 9;
			}

			else if( aaa >= 5 )
			{
				printf("V");
				aaa -= 5;
			}

			else if( aaa >= 4 )
			{
				printf("IV");
				aaa -= 4;
			}

			else if( aaa >= 1 )
			{
				printf("I");
				aaa -= 1;
			}

			

		}

		printf("\n");
	}



} 



int main()
{
	deleteMem();

	
	while( true )
	{
		scanf( "%s", in);
		length = strlen(in);
		in[length] = '\0';
		if(in[0] == 'Q')
		{
			printf("Bye\n");
			break;
		
		}		
		prekladac();
		
	}

	return 0;
}