import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)){
			String line = sc.nextLine();
			String answer ="";

			for(int i=0;i<line.length();i++){
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			}
			System.out.println(answer);
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)){
			String line = sc.nextLine();
			String answer ="";

			for(int i=0;i<line.length();i++){
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			}
			System.out.println(answer);
		}
	}
} Main public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)){
			String line = sc.nextLine();
			String answer ="";

			for(int i=0;i<line.length();i++){
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			}
			System.out.println(answer);
		}
	} main {
		try(Scanner sc = new Scanner(System.in)){
			String line = sc.nextLine();
			String answer ="";

			for(int i=0;i<line.length();i++){
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			}
			System.out.println(answer);
		}
	} try(Scanner sc = new Scanner(System.in)){
			String line = sc.nextLine();
			String answer ="";

			for(int i=0;i<line.length();i++){
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			}
			System.out.println(answer);
		} {
			String line = sc.nextLine();
			String answer ="";

			for(int i=0;i<line.length();i++){
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			}
			System.out.println(answer);
		} Scanner sc = new Scanner(System.in) Scanner sc = new Scanner(System.in) new Scanner(System.in) String line = sc.nextLine(); line sc.nextLine() sc.nextLine sc String answer =""; answer "" for(int i=0;i<line.length();i++){
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			} int i=0; int i=0; i 0 i<line.length() i line.length() line.length line i++ i++ i {
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			} {
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			} char ch = line.charAt(i); ch line.charAt(i) line.charAt line i if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch); Character.isLowerCase(ch) Character.isLowerCase Character ch answer = answer + Character.toUpperCase(ch) answer answer + Character.toUpperCase(ch) answer Character.toUpperCase(ch) Character.toUpperCase Character ch answer = answer + Character.toLowerCase(ch) answer answer + Character.toLowerCase(ch) answer Character.toLowerCase(ch) Character.toLowerCase Character ch System.out.println(answer) System.out.println System.out System System.out answer String[] args args public class Main {
	public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)){
			String line = sc.nextLine();
			String answer ="";

			for(int i=0;i<line.length();i++){
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			}
			System.out.println(answer);
		}
	}
} public class Main {
	public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)){
			String line = sc.nextLine();
			String answer ="";

			for(int i=0;i<line.length();i++){
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			}
			System.out.println(answer);
		}
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)){
			String line = sc.nextLine();
			String answer ="";

			for(int i=0;i<line.length();i++){
				char ch = line.charAt(i);
				if(Character.isLowerCase(ch)) answer = answer + Character.toUpperCase(ch);
				else answer = answer + Character.toLowerCase(ch);
			}
			System.out.println(answer);
		}
	}
}
