#include <stdio.h>

typedef struct {
    int printed;
    int offset;
    int max;
} Month;

Month   g_year[12];

void init(void)
{
    int i;

    for (i = 0; i < 12; i++) {
        g_year[i].printed = 0;
        g_year[i].offset = i * 30;
        g_year[i].max = 30;
    }
}

void print_line(int month)
{
    int i;

    printf("%*s", 3 * ((g_year[month].printed + g_year[month].offset) % 7), "");

    for (i = (g_year[month].printed + g_year[month].offset) % 7; i < 7; i++) {
        if (g_year[month].printed >= g_year[month].max) {
            printf("   ");
        } else {
            printf("%3d", ++g_year[month].printed);
        }
    }
}

void print_4_months(int first)
{
    int i;
    int end_flg[4] = {0};

    for (;;) {
        int flg = 0;
        for (i = 0; i < 4; i++) {
            print_line(i+first);
            putchar(' ');
            if (g_year[i+first].printed >= g_year[i+first].max) {
                end_flg[i] = 1;
            }
            flg += end_flg[i];
        }
        puts("");
        if (flg == 4)
            break;
    }
}

int main(void)
{
    init();
    print_4_months(0); puts("");
    print_4_months(4); puts("");
    print_4_months(8); puts("");

    return 0;
}

void print_line(int month)
{
    int i, num_of_blanks = (g_year[month].printed + g_year[month].offset) % 7;

    for (i = 0; i < num_of_blanks; i++) {
        printf("   ");
    }
    for (i = num_of_blanks; i < 7; i++) {
        if (g_year[month].printed >= g_year[month].max) {
            printf("   ");
        } else {
            printf("%3d", ++g_year[month].printed);
        }
    }
}

void print_4_months(int first)
{
    for (;;) {
        int flg = 0, i;
        for (i = 0; i < 4; i++) {
            print_line(i+first);
            putchar(' ');
            if (g_year[i+first].printed >= g_year[i+first].max) {
                flg++;
            }
        }
        puts("");
        if (flg == 4)
            break;
    }
}