class Util:
    @staticmethod
    def format_seconds(seconds):
        hours = None
        minutes = seconds / 60
        if minutes >= 1:
            if minutes >= 60:
                hours = int(minutes / 60)
                minutes = int(minutes % 60)
            else:
                minutes = int(minutes)
            seconds = seconds % 60
        else:
            minutes = None

        time = ""
        if hours is not None and hours != 0:
            time += str(hours) + "h"
        if minutes is not None and minutes != 0:
            time += str(minutes) + "m"
        if seconds is not None and seconds != 0:
            time += str(seconds) + "s"

        return time