import java.util.Scanner;

public class DataType {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
//		byte short int long
//		double float char boolean

//		String can store a sentence, word etc.

//		type name = value
		String S = "11";

//		String is a reference data type
//		reference data type has functions

//		S.valueOf
//		S.charAt
//		S.length()
//		S.compareTo(anotherString)
		System.out.println(S.length());

		int A = 11;
		if (A==11) {
			System.out.println("equals");
		}

		if (S.equals("11")) {
			System.out.println("equals");
		}

		String T = "ABC";
		//Task 1
		//output T's length
		System.out.println(T.length());
		//Task 2
		//if T equals to ABC
		//output "YES"
		//else output "NO"
		if (T.equals("ABC")) {
			System.out.println("YES");
		} else {
			System.out.println("NO");
		}


//		String E = "I am good";
//		if E contains "good"
//		output YES
//		else output NO

		String E = "I am good";
		if (E.contains("good")) {
			System.out.println("YES");
		} else {
			System.out.println("NO");
		}
                  //01234
		String F = "ABCDE";
		//index position
		System.out.println(S.charAt(0));
		//using charAt to output D
		System.out.println(S.charAt(3));
		//using charAt to output E
		System.out.println(S.charAt(4));

		String K = "I am Cindy";
		//using function substring
		//to output "Cindy" from K
		System.out.println(K.substring(5,10));

		//input a String and store into
		//variable J

		Scanner sc = new Scanner(System.in);
		String J = sc.nextLine();
		System.out.println(J);
	}
}