import java.util.ArrayList;
import java.util.Scanner;

public class DuplicatedLetters {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        String str = scan.nextLine();

        int operations = 0;

        ArrayList<Character> chars = new ArrayList<>();

        int length = str.length();
        for (int i = 0; i < length; i++) {
            chars.add(str.charAt(i));
        }

        for (int i = 0; i < chars.size() - 1; i++) {
            if (chars.get(i) == chars.get(i + 1)){
                operations++;
                chars.remove(i + 1);
                chars.remove(i);
                i = - 1;
            }
        }

        StringBuilder sb = new StringBuilder();
        for (char ch :
                chars) {
            sb.append(ch);
        }
        if (sb.length() > 0){
            System.out.println(sb);
        }
        else{
            System.out.println("Empty String");
        }

        System.out.printf("%d operations\n", operations);
    }
}