#include <stdio.h>
int main(void){
	int begin_x, begin_y, end_x, end_y;
	int i,j, temp;
	
	do {
		printf("始点 x :");
		scanf("%d",&begin_x);
	}while(begin_x<1 || begin_x>9);
	do {
		printf("始点 y :");
		scanf("%d",&begin_y);
	}while(begin_y<1 || begin_y>9);
	do {
		printf("始点 x :");
		scanf("%d",&end_x);
	}while(end_x<1 || end_x>9);
	do {
		printf("始点 x :");
		scanf("%d",&end_y);
	}while(end_y<1 || end_y>9);
	
	printf("x=  ");
	for(i=1;i<=9;i++) printf("%3d",i);
	printf("\n");
	
	for(j=1;j<=9;j++){
		if(j==1) printf("y="); else printf("  ");
		printf("%2d",j);
		for(i=1;i<=9;i++){
			if(i>=begin_x && i<=end_x && j>=begin_y && j<=end_y){
				printf("%3d",i*j);
			} else {
				printf("   ");
			}
		}
		printf("\n");
	}
	return 0;
}