大佬可以帮忙看下第二题我这样做有什么问题吗？

import java.util.ArrayList; import java.util.Scanner; public class Poke { public static void main(String[] args){
        Scanner in = new Scanner(System.in); int s=in.nextInt();
        String[][]a=new String[s][2]; for(int i=0;i<s;i++){
            a[i][0]=in.next();
            a[i][0].trim();
            a[i][1]=in.next();
        }
        StringBuilder result=new StringBuilder(); for(int i=0;i<s;i++){
            StringBuilder ans=new StringBuilder();
            StringBuilder ans2=new StringBuilder();
            ArrayList<Integer> mei=new ArrayList<>();
            ArrayList<Integer> tmp=new ArrayList<>();
            ArrayList<Integer> ming=new ArrayList<>();
            String a0=a[i][0];
            String a1=a[i][1]; for(int x=0;x<a0.length();x++){
                mei.add(a0.charAt(x)-'0');
            } for(int x=0;x<a1.length();x++){
                ming.add(a1.charAt(x)-'0');
            } int count=0; for(int j=0;j<mei.size();j++){ if(!ming.contains(mei.get(j))){
                        ans.append("d ");
                        ans2.append("d ");
                }else{ if(count==0){
                        ans.append("l ");
                        ans2.append("r ");
                        tmp.add(mei.get(j));
                        count++;
                    }else{ if(ming.indexOf(mei.get(j))<ming.indexOf(mei.get(j-1))){
                            ans.append("l ");
                            ans2.append("l ");
                            tmp.add(0,mei.get(j));
                        }else{
                            ans.append("r ");
                            ans2.append("r ");
                            tmp.add(tmp.size()-1,mei.get(j));
                        }
                    }
                }
            } if(tmp.size()==0){
                result.append("{"+"\n");
                result.append("}"+"\n"); break;
            } for(int x=0;x<tmp.size();x++){ if(tmp.get(x)!=ming.get(x)){
                    result.append("{"+"\n"+"}"); break;
                }
            }
            result.append("{"+"\n");
            result.append(ans);
            result.append("\n");
            result.append(ans2+"\n");
            result.append("}"+"\n");
        }
        System.out.println(result);
    }
}