Writing Systems of the World 4, Exercise 2: the katakana offset

Code (run with py -X utf8):

import unicodedata
for h in "さしす":
    k = chr(ord(h) + 0x60)
    print(h, k, unicodedata.name(h), "|", unicodedata.name(k))

Output from the run:

さ サ HIRAGANA LETTER SA | KATAKANA LETTER SA
し シ HIRAGANA LETTER SI | KATAKANA LETTER SI
す ス HIRAGANA LETTER SU | KATAKANA LETTER SU

Yes, the offset still works for these three. Note that Unicode names the
second one SI, not SHI: the names follow a systematic spelling of the kana
rows, not the usual romanisation. I have only checked these six characters,
so I do not claim the offset holds for every kana pair.