import java.util.Scanner;

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

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

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

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

} Main
import java.util.Scanner;

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

}
