def steps_to_convert(line1, line2):
    len_line1 = len(line1)
    len_line2 = len(line2)
    if line1 == "" or line2 == "":
        return len_line1 if len_line1 != 0 else len_line2
    similarities = has_similar(line1, line2)
    if len(similarities) > 0:
        return abs(max(len_line1, len_line2) - len(similarities))
    else:

        if len_line1 < len_line2:
            if line1 in line2:
                return len_line2 - len_line1
        else:
            if line2 in line1:
                return len_line1 - len_line2
        return 0


def has_similar(line1, line2):
    similarities = []
    for index, letter in enumerate(line1):
        if letter == line2[index]:
            similarities.append(index)
    return similarities


if __name__ == "__main__":
    # These "asserts" using only for self-checking and not necessary for auto-testing
    assert steps_to_convert('line1', 'line1') == 0, "eq"
    assert steps_to_convert('line1', 'line2') == 1, "2"
    assert steps_to_convert('line', 'line2') == 1, "none to 2"
    assert steps_to_convert('ine', 'line2') == 2, "need two more"
    assert steps_to_convert('line1', '1enil') == 4, "everything is opposite"
    assert steps_to_convert('', '') == 0, "two empty"
    assert steps_to_convert('l', '') == 1, "one side"
    assert steps_to_convert('', 'l') == 1, "another side"
    print("You are good to go!")