import java.util.Scanner;


public class sameLetters {
	static Scanner in=new Scanner(System.in);
	public static void main(String[] args) {
		int i=0;
		while(true){
			i++;
			String s=in.next();
			String t=in.next();
			if(s.equals("END")) break;
			int[]a1 = new int[26];
			int[]a2 = new int[26];
			if (s.length()!=t.length()) System.out.println("Case "+i+": different");
			else{
				for(int j=0;j<s.length();j++){
					char c1 = s.charAt(j);
					char c2 = t.charAt(j);
					int index1 = (int)c1-97;
					int index2 = (int)c2 -97;
					a1[index1]++;
					a2[index2]++;
				}
				boolean same=true;
				for(int j=0;j<26;j++){
					if(a1[j]!=a2[j]) same=false;
				}
				if(same) System.out.println("Case "+i+": same");
				else System.out.println("Case "+i+": different");
			}
		}
	}
}