#include <stdio.h>
#include <stdlib.h>
 
//必要があれば変数などを追加してもOKです
 
int main(){
    int i, j, k, l, m, count=0;
    int a, b;
    int **mat;
    scanf("%d %d", &a, &b);
 
	//ここで2次元配列の動的確保をする
	mat=(int **)malloc(sizeof(int)*a);
    if(mat==NULL){
        printf("ERROR\n");
    }
 
    for(m=0;
    m<a;
    m++){
        mat[m]=(int *)malloc(sizeof(int)*b);
    }
    if(mat==NULL){
        printf("ERROR\n");
    }
 
 
	//ここで2次元配列に数値を代入する
	for(k=0;
    k<a;
    k++){
        for(l=0;
        l<b;
        l++){
            mat[k][l]=count;
            count++;
        }        
    }
 
    //以下の部分は表示の部分です
    //いじらなくてOK
    for(i=0;i<a;i++){
        for(j=0;j<b;j++){
            printf("%d ",mat[i][j]);
        }
        printf("\n");
    }
 
    //さて，最後に忘れずにすることと言えば？
 
 
    return 0;
}
 

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