When all other levels are equal, the identical level is used as a tiebreaker.
Strongest level, denote difference between base characters
When punctuation is ignored at level 1-3, an additional level can be used to distinguish words with and without punctuation.
Accents in characters are considered secondary differences
Upper and lower case differences in characters are distinguished at the tertiary level.
Returns the CollationStrength from the string value.
the int value.
the read concern