import java.io.BufferedReader;
import java.io.InputStreamReader;

/**
 * http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=ITP1_5_A
 * 
 * @author eitatsuro
 * 
 */
public class Main {
    static final String HASHMARK = "#";
    
    public static void main(String[] args) {
        try {
            BufferedReader stdReader = new BufferedReader(
                    new InputStreamReader(System.in));
            
            String sStr;
            while ((sStr = stdReader.readLine()) != null) {
                String[] inputs = sStr.split(" ");
                
                int h = Integer.valueOf(inputs[0]);
                int w = Integer.valueOf(inputs[1]);
                
                if (h == 0 && w == 0) {
                    break;
                    // nothing to do.
                }
                
                for (int i = 0; i < h; i++) {
                    for (int j = 0; j < w; j++) {
                        System.out.print(HASHMARK);
                    }
                    System.out.println();
                }
                System.out.println();
            }
            stdReader.close();
        } catch (Exception e) {
            System.exit(-1);
        }
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz