import java.io.*;

class Main{
  public static void main(String[] args) throws IOException{
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringBuilder sb = new StringBuilder();

    while(true){
    String str1 = br.readLine();
    String[] str2 = str1.split(" ");
    int H = Integer.parseInt(str2[0]);
    int W = Integer.parseInt(str2[1]);

    if(H == 0 && W == 0) {break;}

    for (int i = 0; i < H; i++){
      for(int j = 0; j < W; j++){
        sb.append("#");
      }
      sb.append("\n");
    }
    sb.append("\n");
    }
    System.out.print(sb);
  }
}
/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