/*  Author  Anil Seth
    Date    August 2003  */

import java.io.*;

public class Arrays_Simple{

   public static boolean member(char[] a, char x){
        if(a==null||a.length==0) return false;

	for(int i=0; i<a.length; i++)
           if(x==a[i])return true;
	
        return false;
    }

   
    public static char[] deleteall(char[] a, char x){
        if(a==null||a.length==0) return a;
        
	char[] c = new char[a.length];
	int j=0;
	for(int i=0; i<a.length; i++)
           if (x != a[i]){c[j]=a[i]; j++;} 
	
	char[] res = new char[j];

	for(int i=0; i< res.length ; i++)res[i]=c[i];
	
	return res;
    }

    

   public static char[] setify(char[] a){
     
       if (a==null||a.length==0) return a;  
       
       char[] result = new char[a.length];
       int i=0;
       char ch;
   l1: for (int j=0; j<a.length; j++){
            ch = a[j];
	    for(int k=0; k<i; k++)
		if (ch==result[k]) continue l1;
 
	     result[i]=ch;
	     i++;
	}

        char[] res = new char[i]; //i>=1 holds at this point
        for (int j=0; j<res.length ; j++) res[j]=result[j];

	return res;
    }

   
    public static char[] intersect(char[] a, char[] b){
           if(a==null||b==null)return null;
	   char[] c = new char[b.length];
	   for(int i=0; i<b.length ; i++)c[i]=b[i];
	   
	   int pc=0;
	   char ch;
	   for(int i=0; i<a.length ; i++){
		   
		ch=a[i];   
	        for(int j=pc ; j < c.length ; j++)
		    if (ch==c[j]){char ch1=c[pc];
			           c[pc]=c[j];
				   c[j]=ch1;
				   
				   pc++;
				   break;}
	   }
           
	   char[] res = new char[pc];
	   for(int i=0; i<res.length ; i++)res[i]=c[i];
	 
	   return res;
      }
	   
      public static boolean multsub(char[] a, char[] b){
	   char[] c = intersect(a,b);
	   if(a.length==c.length) return true; else return false;
      }
   
    				   
				   
  public static void main(String[] args){

      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      
      System.out.println("Enter Input (type two lines)");

      String str1, str2;
      
      try{   
            str1 = br.readLine();
            str2 = br.readLine();
      } catch(IOException e){System.out.println("Improper Input"); return;
      
      }
 
	  char[] a = str1.toCharArray();
	  char[] b = str2.toCharArray();
	 
	  System.out.println("a is:"+ new String(a)+
			     "\n"+"b is:"+ new String(b));
	  
	  System.out.println("setify a is:"+ new String(setify(a))+
			     "\n"+"setify b is:"+ new String(setify(b)));
	  
	  System.out.println("Intersection of a and b is:"+
			      new String(intersect(a,b)));
	  
          System.out.println("a contained in b is:"+ multsub(a,b));
	
	  System.out.println("a[0] is a member of b is:"+ member(b,a[0]));
	  
          System.out.println("Deleting all occurrences of a[1] from b gives:"
			        + new String(deleteall(b,a[1])));
	  
  
  }

}