import java.util.Scanner;
	class Lab1 {
		public static void main(String args[]) {
			//announce variable
			String grade_temp;
			char grade;
			//setup input method
			Scanner grade_temp_input = new Scanner (System.in);
			//show input
			System.out.print("Enter Grade :: ");
			grade_temp = grade_temp_input.nextLine();
			//convert string to char and uper case
			grade = grade_temp.toUpperCase().charAt(0);
			//construction
			switch (grade) {
				case 'A' : System.out.println("Excallent"); break;
				case 'B' : System.out.println("Good"); break;
				case 'C' : System.out.println("Bad"); break;
				default : System.out.println("Invalid");
			}
		}
	}

import java.util.Scanner;
	class Lab2 {
		public static void main(String args[]) {
			//announce variable
			int month,year;
			//setup input method
			Scanner month_input = new Scanner (System.in);
			Scanner year_input = new Scanner (System.in);
			//show input
			System.out.print("Enter your month :: ");
			month = month_input.nextInt();
			System.out.print("Enter your year :: ");
			year = year_input.nextInt();
			//construction
			switch (month) {
				case 1 : 
                                case 3 : 
                                case 5 : 
                                case 7 : 
                                case 8 : 
                                case 10 : 
                                case 12 :
					System.out.println("Days = 31"); break;
				case 4 : 
                                case 6 : 
                                case 9 : 
                               case 11 :
					System.out.println("Days = 30"); break;
				case 2 :
					if (((year%4==0)&&!(year%100==0))||(year%400==0)) {
						System.out.println("Days : 29");
					}else{
						System.out.println("Days : 28");
					} break;
 
			}
			//end
		}
	}

import java.util.Scanner;
	class Test1 {
		public static void main(String[] args) {
			//announce variable
			int number1,number2;
			//setup input method
			Scanner number1_input = new Scanner (System.in);
			Scanner number2_input = new Scanner (System.in);
			//show input
			System.out.print("Enter Number 1 >>> ");
			number1 = number1_input.nextInt();
			System.out.print("Enter Number 2 >>> ");
			number2 = number2_input.nextInt();
			//construction
			switch(number1) {
				case 1 : System.out.println("One"); break;
				case 2 : System.out.println("Two"); 
					if (number2 >= 10) {
						System.out.println("Max");
					}else{
						System.out.println("Min");
					} break;
				case 3 : System.out.println("Three"); break;
				default : System.out.println("Invalid");
				//end
				}
			}
		}

import java.util.Scanner;
	class Test2 {
		public static void main(String[] args) {
			//announce variable
			String string1;
			char char1;
			int number1;
			//setup input method
			Scanner string1_input = new Scanner (System.in);
			Scanner number1_input = new Scanner (System.in);
			//show input
			System.out.print("Enter Letter >>> ");
			string1 = string1_input.nextLine();
			System.out.print("Enter Number2 >>> ");
			number1 = number1_input.nextInt();
			//convert string to char
			char1 = string1.toUpperCase().charAt(0);
			//construction
			switch(char1) {
				case 'A' : System.out.println("One"); break;
				case 'B': System.out.println("Two"); 
					if (number1 >= 10) {
						System.out.println("Max");
					}else{
						System.out.println("Min");
					} break;
				case 'C' : System.out.println("Three"); break;
				default : System.out.println("Invalid");
				//end
				}
			}
		}