public class Decipherer {

	public static void main(String[] args) {
		String message1 = "0@sn9sirppa@#?ia'jgtvryko1";
		String message2 = "q8e?wsellecif@#?sel@#?setuotpazdsy0*b9+mw@x1vj";
		String message3 = "aopi?sedohtém@#?sedhtmg+p9l!";

		String messageCoder1 = decodage(message1, 5);
		String messageCoder2 = decodage(message2, 5);
		String messageCoder3 = decodage(message3, 5);

		System.out.printf("Le message décrypté est : '%s , %s, %s'.", messageCoder1, messageCoder2, messageCoder3);

	}

	private static String decodage(String message, int start) {
		String chaine = message;
		int value;
		int chiffrecle;

		value = chaine.length();
		chiffrecle = value /2;

		String souschaine = chaine.substring(start, (start+chiffrecle));
		String sousChaineAvecEspace = souschaine.replace("@#?", " ");

		String result = new StringBuilder(sousChaineAvecEspace).reverse().toString();

		return result;
	}



}