public static final String indexes = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	public static final String CORRUPT = "CORRUPTED";

	public static void main(String args[]){
		System.out.println(uncorrupt("\\17ACD\\2B"));
	}

	public static String uncorrupt(String arg){
		String output = "";

		for(int i = 0; i < arg.length(); i++){
			if((arg.charAt(i) == '\\' && arg.length() < i + 2)) output = CORRUPT;
		}

		for(int i = 0; i < arg.length(); i++){
			if(arg.charAt(i) == '\\'){
				int repeat = indexes.indexOf(arg.charAt(i + 1)) + 3;
				for(int r = 0; r < repeat; r++) output += arg.charAt(i + 2);
				i += 2;
			}else output += arg.charAt(i);
		}
		return output;
	}