题解 | #字符串加解密#

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc =new Scanner(System.in);
        String s1=sc.nextLine();
        String s2=sc.nextLine();
        
        StringBuilder ss1=new StringBuilder();
        StringBuilder ss2=new StringBuilder();
        for(int i=0;i<s1.length();i++){
            char c=s1.charAt(i);
            if(Character.isLetter(c)){
                if(Character.isUpperCase(c)){
                    if(c=='Z') ss1.append('a');
                    else{
                          ss1.append(Character.toLowerCase((char)(c+1)));
                    }
                } else if(c=='z')ss1.append('A');
                else ss1.append(Character.toUpperCase((char)(c+1)));  
            }else{
                if(c=='9')
                ss1.append('0');
                else ss1.append((char)(c+1));
            }
        }
        System.out.println(ss1.toString());
        
        
            for(int i=0;i<s2.length();i++){
            char c=s2.charAt(i);
            if(Character.isLetter(c)){
                if(Character.isUpperCase(c)){
                    if(c=='A') ss2.append('z');
                    else{
                          ss2.append(Character.toLowerCase((char)(c-1)));
                    }
                } else if(c=='a')ss2.append('Z');
                else ss2.append(Character.toUpperCase((char)(c-1)));  
            }else{
                 if(c=='0')
                ss2.append('9');
                else ss2.append((char)(c-1));
            }
        }
         System.out.println(ss2.toString());
    }
}