import java.util.Scanner;
import java.lang.StringBuilder;

public class Marcel {

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

		String query = "";

		for(int i = 0; i < 26; ++i) {
			query += (char) ('a' + i);
		}

		System.out.println("? " + query);
		System.out.flush();

		int n = s.nextInt();
		int length = 0;
		for(int i = 0; i < n; ++i) {
			length = Math.max(length, s.nextInt());
		}

		boolean[][] possChars = new boolean[26][length];
		for(int i = 0; i < 26; ++i) {
			for(int j = 0; j < length; ++j) {
				possChars[i][j] = true;
			}
		}
		
		for(int i = 0; i < 5; ++i) {
			query = "";
			for(int j = 0; j < 26; ++j) {
				if((j & (1 << i)) != 0) {
					query += (char) ('a' + j);
				}
			}
			System.out.println("? " + query);
			System.out.flush();

			n = s.nextInt();
			boolean[] pos = new boolean[length];
			for(int rep = 0; rep < n; ++rep) {
				int p = s.nextInt();
				pos[p-1] = true;
			}
			for(int p = 0; p < length; ++p) {
				for(int c = 0; c < 26; ++c) {
					if(!pos[p] && (c & (1 << i)) != 0) {
						possChars[c][p] = false;
					}
					if(pos[p] && (c & (1 << i)) == 0) {
						possChars[c][p] = false;
					}
				}
			}
		}
		StringBuilder out = new StringBuilder();
		
		for(int i = 0; i < length; ++i) {
			for(int j = 0; j < 26; ++j) {
				if(possChars[j][i]) {
					out.append((char) ('a' + j));
				}
			}
		}
		
		System.out.println("! " + out.toString());
	}
	
}