Sounds like days of the week, or integers starting at zero (or maybe at one), or perhaps months of the year, in a language I don’t know. But that’s by induction, not knowledge.
It's from a Dr Seuss book called On Beyond Zebra in which he invents twenty new letters to go after Z and twenty new animals whose names begin with those letters. As Dr Seuss is not commonly known in the UK I wondered if this book was known in the US where Dr Seuss is far more widely read. (For the record the letter after Glik is Nuh)
