def METHOD_NAME(datestring):
    datestringit = datestring[-4:] + datestring[3:5] + datestring[:2]
    nextmonat = int(datestring[3:5]) + 1
    nextyear = int(datestring[-4:])
    if (nextmonat > 12):
        nextyear = int(nextyear) + 1
        nextmonat = 1
    nextmonats = '0' + str(nextmonat)
    datestringitnext = str(nextyear) + nextmonats[-2:] + '01'
    return (datestringit, datestringitnext)