import java.util.*;

public class expr {
	static StringBuffer b = new StringBuffer();

	public static int rton(StringBuffer r, int from, int to) {
		int length = to -from;
		
		int out = 0;
		for(int i = length -1; i >= 0; i--) {
			char c = r.charAt(from +i);
			char d = r.charAt(from +i -1);
			if(c == 'O') {
				continue;
			}

			if(c == 'I') {
				out++;
				continue;
			}

			if(c == 'V') {
				if(i > 0 && d == 'I') {
					out = out +4;
					i--;
					continue;
				} else {
					out = out +5;
					continue;
				}
			}

			if(c == 'X') {
				if(i > 0 && d == 'I') {
					out = out +9;
					i--;
					continue;
				} else {
					out = out +10;
					continue;
				}
			}

			if(c == 'L') {
				if(i > 0 && d == 'X') {
					out = out +40;
					i--;
					continue;
				} else {
					out = out +50;
					continue;
				}
			}

			if(c == 'C') {
				if(i > 0 && d == 'X') {
					out = out +90;
					i--;
					continue;
				} else {
					out = out +100;
					continue;
				}
			}

			if(c == 'D') {
				if(i > 0 && d == 'C') {
					out = out +400;
					i--;
					continue;
				} else {
					out = out +500;
					continue;
				}
			}

			if(c == 'M') {
				if(i > 0 && d == 'C') {
					out = out +900;
					i--;
					continue;
				} else {
					out = out +1000;
					continue;
				}
			}
		}	
		return out;		
	}

	static String ntor(int n) {
		if(n == 0) {
			return "O";
		}

		StringBuffer b = new StringBuffer();
		int r, k;
		k = n;

		r = k / 1000;
		for(int i = 0; i < r; i++) {
			b.append('M');
		}
		k = k - (r*1000);

		r = k / 100;
		if(r == 9) {
			b.append("CM");
		} else if(r > 4) {
			if(r == 8) {
				b.append("DCCC");
			} else if(r == 7) {
				b.append("DCC");
			} else if(r == 6) {
				b.append("DC");
			} else if(r == 5) {
				b.append('D');
			}
		} else if(r == 4) {
			b.append("CD");
		} else if(r == 3) {
			b.append("CCC");
		} else if(r == 2) {
			b.append("CC");
		} else if(r == 1) {
			b.append('C');
		}

		k = k - (r*100);

		r = k / 10;
		if(r == 9) {
			b.append("XC");
		} else if(r > 4) {
			if(r == 8) {
				b.append("LXXX");
			} else if(r == 7) {
				b.append("LXX");
			} else if(r == 6) {
				b.append("LX");
			} else if(r == 5) {
				b.append('L');
			}
		} else if(r == 4) {
			b.append("XL");
		} else if(r == 3) {
			b.append("XXX");
		} else if(r == 2) {
			b.append("XX");
		} else if(r == 1) {
			b.append('X');
		}

		k = k - (r*10);

		r = k;
		if(r == 9) {
			b.append("IX");
		} else if(r > 4) {
			if(r == 8) {
				b.append("VIII");
			} else if(r == 7) {
				b.append("VII");
			} else if(r == 6) {
				b.append("VI");
			} else if(r == 5) {
				b.append('V');
			}
		} else if(r == 4) {
			b.append("IV");
		} else if(r == 3) {
			b.append("III");
		} else if(r == 2) {
			b.append("II");
		} else if(r == 1) {
			b.append('I');
		}		

		return b.toString();
	}
	
	static int UNINICIALIZED = -1;

	static void print(String s){
		System.out.println(s);
	}	
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);		

		int[] registers = new int[11];

		for(int i = 0; i< 11; i++)
			registers[i] = UNINICIALIZED;

here:
		while(true){
			StringBuffer line = new StringBuffer(s.nextLine());

			if(line.toString().startsWith("QUIT")){
				print("Bye");
				break;
			}

			if(line.toString().startsWith("RESET")){
				for(int i = 0; i< 11; i++)
					registers[i] = UNINICIALIZED;
				print("Ready");
				continue;
			}
		

			int r = -1;
			int last = 0;
			int sum = 0;

			for(int i=0; i < line.length(); i++){
				char c = line.charAt(i);
				if(c == '='){
					r = Integer.parseInt(line.substring(0,i));
					last = i;
					continue;
				}	
					
				if(c == '+' || c == '-' || i == line.length()-1){
					int n = 0;
					if(i == line.length() -1) i++;
					try{
						int r2 = Integer.parseInt(line.substring(last+1, i));
						n = registers[r2];
						if(n == UNINICIALIZED){
							print("Error");
							continue here;
						}

					}catch( NumberFormatException e){
						n = rton(line, last+1, i);
						//print("!");
					}
					
					if(line.charAt(last) == '=' || line.charAt(last) == '+'){
						//print("+"+n);
						sum += n;
					}
					else if(line.charAt(last) == '-'){
						sum -= n;
						//print("-"+n);
					}
					last = i;
				}
			}
			if(sum > 10000 || sum < 0){
				print("Error");
				continue;
			}

			registers[r] = sum;
			print(""+r+"="+ntor(sum));
		}
	}
}