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a character set that includes letters and digits and punctuation
a 9-digit SBN
in Morse code, code which represents numerals, called numeral code
a character set that includes letters and is used to write a language
小文字;a、b、cなど
lowercase letters; a and b and c etc
128 characters that make up the ASCII coding scheme
any notation that uses 2 characters (usually 0 and 1)
A character which is different from the standard, named 'Variant letter'
letters called {tadpole-like characters}