import java.util.*;

class Main {
    public static void main(String [] args){
        Scanner scan = new Scanner(System.in);
        
        while(true){
            int h = scan.nextInt();
            int w = scan.nextInt();
            
            if(h == 0 && w == 0) break;
            
            for(int i = 0; i < h; ++i){
                for(int 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