For those who find themselves needing to write pīnyīn, two additions: option-a then a, e, i, o, or u: ā ē ī ō ū or Ā Ē Ī Ō Ū option-v then a, e, i, o, or u: ă

For those who find themselves needing to write pīnyīn, two additions: option-a then a, e, i, o, or u: ā ē ī ō ū or Ā Ē Ī Ō Ū option-v then a, e, i, o, or u: ă ě ǐ ǒ ǔ or Ǎ Ě Ǐ Ǒ Ǔ