Hangul syllable pyup

On a Korean two-set keyboard, press v, b, v.

Switch the input method to Korean and select the standard two-set layout, called Dubeolsik: v enters initial ㅍ, b enters vowel ㅠ, and the last v completes final ㅍ. If a vowel follows, the input method may move that final consonant to the next syllable's start; this is ordinary Hangul composition.

The sequence 픂 spells the same syllable with three conjoining jamo—Korean consonant and vowel letters designed to join into syllable blocks. The single block and the decomposed sequence are two encodings of one syllable.

Why is 픂 one Hangul block?

It groups three Korean letters into one syllable block.

Hangul is the Korean alphabet: consonant and vowel letters are arranged in a square-shaped block for each syllable. Hangul's creation is recorded in 1443; the 1446 Hunminjeongeum, a guide whose title means “Correct Sounds to Instruct the People,” explained the letters and how to arrange them into blocks. Before Hangul, Korean was written largely with Chinese characters, which did not represent Korean speech directly.

Early books written in Hangul included translations, religious and practical works, dictionaries, and literature; it also appeared beside Chinese characters. Older labels for the script included eonmun (“vernacular writing”) and amkeul (“women's writing”), the latter used dismissively. Advocates used Hangul as a positive name around 1913; a magazine with that title helped popularize it in 1927. Some accounts propose a historical influence from the Phags-pa script, but that link is disputed; resemblance alone is not proof.