#include <stdio.h>
main()
{

	int  i, m, week, days[12]={31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
		 w[12] = {4, 0, 1, 4, 6, 2, 4, 0, 3, 5, 1, 3};

	printf("Input the month(1~12):");
	scanf("%d", &m);
	week=0;
	//for(i=0;i<m;i++) week += w[i];
	week = w[m-1];
	printf("Sun Mon Tue Wed Thu Fri Sat\n");
	for(i=0;i<week;i++) printf("    ");
	for(i=1; i<=days[m-1]; i++){
		printf("%3d ", i);
		if(week==6) {
			printf("\n");
			week=0;}
		else week++;
	}
	printf("\n");
}