The concatenation of the ascii_lowercase and ascii_uppercase constants described below. This value is not locale-dependent
The lowercase letters 'abcdefghijklmnopqrstuvwxyz'. This value is not locale-dependent and will not change
The uppercase letters 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'. This value is not locale-dependent and will not change.
The string '0123456789'.
The string '0123456789abcdefABCDEF'
The concatenation of the strings lowercase and uppercase described below.
The lowercase letters 'abcdefghijklmnopqrstuvwxyz'. This value is not locale-dependent and will not change
The string '01234567'.
String of ASCII characters which are considered punctuation characters.
String of characters which are considered printable. This is a combination of digits, letters, punctuation, and whitespace.
A string containing all the characters that are considered uppercase letters. On most systems this is the string 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.
A string containing all characters that are considered whitespace. On most systems this includes the characters space, tab, linefeed, return, formfeed, and vertical tab