public class K2_B {

    public static void main(String[] args) {
        String[] tab = {"Ala_1", "Ela_12", "Zenon_15", "Krystyna_6", "Lucjan_5"};
        String[] tabString = new String[tab.length];
        int[] tabInt = new int[tab.length];
        StringBuilder sb = new StringBuilder();

        for(int i = 0; i < tab.length; i++) {
            sb.delete(0, sb.length());
            sb.append(tab[i].substring(0, tab[i].indexOf("_")));
            tabString[i] = sb.toString();
        }

        for(int i = 0; i < tab.length; i++) {
            tabInt[i] = Integer.parseInt(tab[i].substring(tab[i].indexOf("_") +1 , tab[i].length()));
        }

        for(int i = 0; i < tab.length; i++) {
            System.out.println(tabString[i]);
        }

    }

}