public class Main {
    public static void main(final String[] args) {
        String str = "helloworldnewday";
        double length = Math.sqrt(str.length());
        int x = (int) length;
        for (int i = 0, len = str.length(); i < len; i++) {
            System.out.print(str.charAt(i) + " ");
            if (i % x == x - 1) {
                System.out.println();
            }
        }
    }
}