Imagine that your language had a pangram—a sentence that uses every letter of the alphabet—without duplicates. Imagine that this pangram was also a poem, and that it's widely known.

For the sake of illustration, pretend that the English pangram

veldt jynx grimps waqf zho buck

is this poem [there are five red spelling wiggles in that line on my browser].

Imagine that this poem is so well known that even in far-flung cultural contexts, "v" signifies firstness, "e" signifies secondness, "l" signifies thirdness, and so on.

You start to find that the letters v, e, l, d, t, j, y get used to mark ordered lists. The names of the notes of the musical scale are given these letters, in this order. Your railway's tickets are labelled V, E, L, for first-, second-, and third-class.

This is a post about iroha. https://en.wikipedia.org/wiki/Iroha