def check_line_length(lines):
    if (not is_strict_mode):
        return ''
    index = [(i + 1) for (i, s) in enumerate(lines) if (len(s) > (90 + 1))]
    if (len(index) > 0):
        return index
    else:
        return ''
def check_line_length(lines):
    if (not is_strict_mode):
        return 
    index = [(i + 1) for (i, s) in enumerate(lines) if (len(s) > (90 + 1))]
    if (len(index) > 0):
        return index
    else:
        return 