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- import java.util.*;
- import java.lang.*;
- import java.io.*;
- public class Main
- {
- public static void main (String[] args) throws java.lang.Exception
- {
- Scanner sc=new Scanner(System.in);
- String s=sc.next();
- int n=s.length();
- String p=sc.next();
- int m= p.length();
- HashMap<Character, Integer> ss= new HashMap<>();
- HashMap<Character, Integer> pp= new HashMap<>();
- for(int i=0;i<m;i++){
- pp.put(p.charAt(i), pp.getOrDefault(p.charAt(i),0)+1);
- }
- int x=n+1, y=n+n+10;
- int i=0, j=0;
- ss.put(s.charAt(0),1);
- // System.out.println(n+" "+i+" "+ j);
- while(j<n){
- int check=1;
- char c='a';
- for(int k=0;k<26;k++){
- if(ss.getOrDefault(c,0) < pp.getOrDefault(c,0))check=0;
- c++;
- }
- // System.out.println(i +" "+j +" "+ check);
- if(check==1){
- if(j-i+1< y-x){
- x=i;
- y=j;
- }
- ss.put(s.charAt(i),ss.getOrDefault(s.charAt(i),0)-1);
- i++;
- }
- else
- {
- j++;
- if(j<n)ss.put(s.charAt(j),ss.getOrDefault(s.charAt(j),0)+1);
- }
- }
- // System.out.print(n+" "+x+" "+y);
- String ans="";
- for(i=x;i<=y;i++)ans+=s.charAt(i);
- if(i==n+1)ans="-1";
- System.out.print(ans);
- }
- }
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