ADSL2

import java.util.*;
import java.util.Arrays;
public class DNA {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		Scanner io = new Scanner(System.in);

		int index = 0;
		String [] splitString;
		while(index < 5) {

		String input = io.next();
		splitString = input.split(",");


		//DIVIDE
		if((splitString[0].toUpperCase()).equals("DIVIDE"))
		{

		}
		//
		char addSubChar = (splitString[0].toUpperCase()).charAt(0);
		char lastCharInt = splitString[0].charAt(-1);

		/ADDn
		if (addSubChar == 'A')
		{
			int lastNumberInt = Character.getNumericValue(lastCharInt);
			String firstSubString = splitString[1].substring(0, lastNumberInt); //AHB
			String [] remSubString = splitString[1].substring(lastNumberInt, splitString[1].length()-1);
			System.out.println(firstSubString);
			char[] firstSSChar = firstSubString.toCharArray(); //A H B
			char[] firstSSCharSort;

			for (int i = 0; i < firstSSChar.length; i++) {
				firstSSCharSort[i] = firstSSChar[i];
			}

			Arrays.sort(firstSSCharSort); // A B H


		}
		//SUBTRACTn
		else if (addSubChar == 'S')
		{
			int lastNumberInt = Character.getNumericValue(lastCharInt);

		}


		} //end while

	}//end main()

}