public class K1_A {

    public static void main(String[] args) {
        String[] tab = {"Ala_1", "Ela_12", "Zenon_15", "Krystyna_6", "Lucjan_5"};

        for(int i = 0; i < tab.length; i++) {
            String nowy = "";
            for(int j = tab[i].lastIndexOf("_") - 1; j >= 0; j--) {
                nowy = nowy + tab[i].charAt(j);
            }
            nowy = nowy + "_";
            for(int j = tab[i].lastIndexOf("_") + 1; j < tab[i].length(); j++) {
                nowy = nowy + tab[i].charAt(j);
            }
            tab[i] = nowy;
            System.out.println(tab[i]);
        }

    }

}