public class Main {

    public static void main(String[] args) {
    System.out.println(sumOfOddPlace(15624));
    }

    public static int sumOfOddPlace(long number) {
    String num = Long.toString(number);
    int sum = 0;
    boolean odd = true;

    for(int i = num.length(); i > 0; i--) {
        if(odd) {
        int foo = Integer.parseInt(num.substring(i-1, i));
        sum += foo;
        odd = false;
        }
        else
        odd = true;
    }

    return sum;
    }
}