Problem: Levko loves tables that consist of n rows and n columns very much. He especially loves beautiful tables. A table is beautiful to Levko if the sum of elements in each row and column of the table equals k.

Unfortunately, he doesn't know any such table. Your task is to help him to find at least one of them. 

Input

The single line contains two integers, n and k (1 ≤ n ≤ 100, 1 ≤ k ≤ 1000).

Output

Print any beautiful table. Levko doesn't like too big numbers, so all elements of the table mustn't exceed 1000 in their absolute value.

If there are multiple suitable tables, you are allowed to print any of them.

Examples

Input

2 4


Output

1 3
3 1


Input

4 7


Output

2 1 0 4
4 0 2 1
1 3 3 0
0 3 2 2

Note

In the first sample the sum in the first row is 1 + 3 = 4, in the second row — 3 + 1 = 4, in the first column — 1 + 3 = 4 and in the second column — 3 + 1 = 4. There are other beautiful tables for this sample.

In the second sample the sum of elements in each row and each column equals 7. Besides, there are other tables that meet the statement requirements.

Solution (in JAVA):

Solution:
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.BufferedWriter;
import java.io.Writer;
import java.io.OutputStreamWriter;
import java.util.InputMismatchException;
import java.io.IOException;
import java.io.InputStream;
/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author o_panda_o(emailofpanda@yahoo.com)
 */
public class Code_361A_LevkoAndTable{
    public static void main(String[] args){
        InputStream inputStream=System.in;
        OutputStream outputStream=System.out;
        InputReader in=new InputReader(inputStream);
        OutputWriter out=new OutputWriter(outputStream);
        _361A_ solver=new _361A_();
        solver.solve(1,in,out);
        out.close();
    }
    static class _361A_{
        public void solve(int testNumber,InputReader in,OutputWriter out){
            int n=in.nextInt(), k=in.nextInt();
            for(int i=0;i<n;++i){
                for(int j=0;j<n;++j){
                    if(i==j) out.print(k,"");
                    else out.print(0,"");
                }
                out.println();
            }
        }
    }
    static class InputReader{
        private InputStream stream;
        private byte[] buf=new byte[1024];
        private int curChar;
        private int numChars;
        private InputReader.SpaceCharFilter filter;
        public InputReader(InputStream stream){
            this.stream=stream;
        }
        public int read(){
            if(numChars==-1){
                throw new InputMismatchException();
            }
            if(curChar>=numChars){
                curChar=0;
                try{
                    numChars=stream.read(buf);
                }catch(IOException e){
                    throw new InputMismatchException();
                }
                if(numChars<=0){
                    return -1;
                }
            }
            return buf[curChar++];
        }
        public int nextInt(){
            int c=read();
            while(isSpaceChar(c)){
                c=read();
            }
            int sgn=1;
            if(c=='-'){
                sgn=-1;
                c=read();
            }
            int res=0;
            do{
                if(c<'0' || c>'9'){
                    throw new InputMismatchException();
                }
                res*=10;
                res+=c-'0';
                c=read();
            }while(!isSpaceChar(c));
            return res*sgn;
        }
        public boolean isSpaceChar(int c){
            if(filter!=null){
                return filter.isSpaceChar(c);
            }
            return isWhitespace(c);
        }
        public static boolean isWhitespace(int c){
            return c==' ' || c=='\n' || c=='\r' || c=='\t' || c==-1;
        }
        public interface SpaceCharFilter{
            public boolean isSpaceChar(int ch);
        }
    }
    static class OutputWriter{
        private final PrintWriter writer;
        public OutputWriter(OutputStream outputStream){
            writer=new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
        }
        public OutputWriter(Writer writer){
            this.writer=new PrintWriter(writer);
        }
        public void print(Object... objects){
            for(int i=0;i<objects.length;i++){
                if(i!=0){
                    writer.print(' ');
                }
                writer.print(objects[i]);
            }
        }
        public void println(){
            writer.println();
        }
        public void close(){
            writer.close();
        }
    }
}