Pinyin use the tone marks to indicate the corresponding characters.
More than one character can be in the same form of Pinyin, with
the same tone marks.
Side Note:
两 liǎng - two, some, a few
两 is used when counting things with a
measure word, 二 is used in numbers.
(Quote: 两 - Wikitionary)
For numbers eleven to nineteen, you would
add a ten (十 shí) before
the single digit numbers.【For
example:】十一 shí yī (eleven), 十二 shí èr (twelve),
十三 shí sān (thirteen), etc.
For numbers such as twenty and thirty,
you would add the ten (十 shí) after
the single digit numbers.【For example:】
二十 èr shí (twenty), 三十 sān shí (thirty), 四十 sì shí (forty), etc.
Similarly, for hundred (百 bǎi), thousand (千 qiān),
ten thousand (万 wàn), and hundred million (亿 yì) you
would also add them after
the single digit numbers.【For example:】九百
bǎi (nine hundred), 九千 jiǔ qiān (nine thousand),
九万 jiǔ wàn (ninety thousand), 九亿 jiǔ yì (nine hundred million).
【Important/Exceptional】Other then twenty (二十 èr shí),
for numbers that start with two, 两 liǎng (two) is
used instead of 二 èr (two).【For example:】两百二十 liǎng bǎi èr shí
(220, two hundred and twenty) not 二百二十
èr bǎi èr shí.