0 a sentence that contains every letter of the alphabet, if possible with each letter only being used once: --
A "perfect pangram" contains every letter of the alphabet only once and can be considered an anagram of the alphabet; it is the shortest possible pangram.
In a sense, the pangram is the opposite of the lipogram, in which the aim is to omit one or more letters.
A heterogram may be distinguished from a pangram (a holoalphabetic sentence), which uses all of the letters of the alphabet (possibly more than once).
The ("e") above would have been pronounced "ye", making the pangram incomplete.
A perfect heterogram is, however, the same as a perfect pangram, since both consist of all letters of the alphabet with each represented exactly once.
In his chapter on wordplay he discusses palindromes and pangrams.
Everybody knows one or two pangrams.
