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

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(
            new InputStreamReader(System.in));
        StringBuilder strb = new StringBuilder();
        String[] data;
        int h = 0;
        int w = 0;
        while (true) {
            data = br.readLine().split(" ");
            h = Integer.parseInt(data[0]);
            w = Integer.parseInt(data[1]);
            if (h == 0 && w == 0) {
                break;
            }
            for (int i = 0; i < h; i++) {
                for (int j = 0; j < w; j++) {
                    strb.append("#");
                }
                strb.append("\n");
            }
            strb.append("\n");
        }
        System.out.print(strb);
    }
}
/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