import java.io.*;

class Main {
    public static void main (String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String[] nums;
        int h, w, i, j;
        while (true) {
            nums = br.readLine().split(" ");
            h = Integer.parseInt(nums[0]);
            w = Integer.parseInt(nums[1]);
            if (h == 0 && w == 0) break;
            for (i = 0; i < h; i++) {
                for (j = 0; j < w; j++) {
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        }
    }
}
/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