//import ohjava.*;
import java.util.*;

public class PrintCalendar {

  public static void main(String args[]) {
    final String monthNames = "JanFebMarAprMayJunJulAugSepOctNovDec";
    GregorianCalendar today;
    String monthString;
    int dayOfWeek, lastDay, month, year;

    today = new GregorianCalendar();
    today.set(Calendar.DATE,1);
    month = today.get(Calendar.MONTH) + 1;
    year = today.get(Calendar.YEAR);
    dayOfWeek = today.get(Calendar.DAY_OF_WEEK) - 1;
    monthString = monthNames.substring((month-1)*3,month*3);

    System.out.println("\n      " + monthString + "  " + year);
    System.out.println(" S  M  T  W  T  F  S");
    System.out.println("--------------------");

    for (int i = 0; i < dayOfWeek; i++)
      System.out.print("   ");

    lastDay = daysInMonth(month,year);

    for (int day=1; day <= lastDay; day++) {
      if (day <= 9)
        System.out.print(" " + day + " ");
      else
        System.out.print(day + " ");
      if ((dayOfWeek+day)%7 == 0)
        System.out.println();
    }
    System.out.println();
  }

  public static int daysInMonth(int month, int year) {
    int numberOfDays = 31;

    switch (month) {
      case 2: numberOfDays = 28;
              if (year%4 == 0) {
                numberOfDays = 29;
                if (year%100 == 0 && year%400 != 0)
                  numberOfDays = 28;
              }
              break;
      case 4: case 6: case 9: case 11: 
              numberOfDays = 30;
              break;
    }
    return numberOfDays;
  }


}