def right_on_field(wdg_clicked, wdg_autofill):
    """establecemos el texto del campo auto-fill"""
    val = wdg_autofill['text']
    wdg_clicked.delete(0, 'end')
    wdg_clicked.insert(0, val)
    if val.isdigit():
        wdg_autofill['text'] = str(int(wdg_autofill['text']) + 1)
