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					import java.util.Scanner;
public class duplicateCharactersInWord
{  
     public static void main(String[] args) 
     {  
        int i=0,j=0,count=0;
        String wd="";
        Scanner sc = new Scanner(System.in);    

        System.out.println("Enter a word");   
        
        wd =sc.next();        
          
        /*Converts given word into character array*/  
        char characters[] = wd.toCharArray();  
          
        System.out.println("Duplicate characters in "+wd+":");  
        for(i = 0; i < characters.length; i++) 
        {  
            count = 0;  
            for(j = i+1; j < characters.length; j++)
            {  
                if(characters[i] == characters[j])
                {  
                    count++;  
                    /*Set characters[j] to ~ to avoid printing visited character*/  
                    characters[j] = '~';  
                }  
            }  
            /*A character is considered as duplicate if count is greater than 1  */
            if(count > 0 && characters[i] != '~') 
            {
                System.out.println(characters[i]);  
            }        
        }  
    }  
}