import java.util.ArrayDeque;
import java.util.Scanner;
public class Main {
	public static void main(String[] a) {
		try (Scanner i = new Scanner(System.in)) {
			while (i.hasNext()) {
				ArrayDeque<Character> d = new ArrayDeque<Character>();
				for (char c : i.nextLine().toCharArray()) d.addLast(c);
				while (d.size() > 1) {
					char c = d.removeFirst();
					d.removeFirst();
					switch (c) {
					case 'a':
						d.addLast('b');
						d.addLast('c');
						break;
					case 'b':
						d.addLast('a');
						break;
					case 'c':
						d.addLast('a');
						d.addLast('a');
						d.addLast('a');
						break;
					}
					for (char x : d) System.out.print(x);
					System.out.println();
				}
			}
		}	
	}
}

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