/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String distinct =
		        "bananas"
		                .codePoints()
		                .distinct()
		                .collect( StringBuilder :: new , StringBuilder :: appendCodePoint , StringBuilder :: append )
		                .toString();
        System.out.println( distinct ) ;
	}
}

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