import java.io.*;
import java.util.*;

public class Solution {

	public static void main(String args[]) throws Exception {

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
		
		StringTokenizer st = new StringTokenizer(br.readLine());
		
		String a = st.nextToken();
		String b = st.nextToken();
		
		boolean done = false;
		int[] cnts = new int[10];
		
		for(int i = 1; i <= 101; i++) {
			if(a.equals(b)) {
				done = true;
				
				pw.println(i);
				
				break;
			}
			
			Arrays.fill(cnts, 0);
			
			a.chars().forEach(c -> cnts[c-'0']++);
			
			StringBuilder newA = new StringBuilder();
			
			for(int j = 0; j < 10; j++) {
				if(cnts[j] == 0)
					continue;
				
				newA.append(cnts[j]);
				newA.append(j);
			}
			
			a = newA.toString();
		}
		
		if(!done)
			pw.println("Does not appear");
			
		pw.close();
	}
}