Compares two strings for alphabetical order, and returns a value accordingly
{{Str gtr str|first string|second string|value if true|value if false}}
Note that the strings are case dependant, and sorted in order of ASCII characters, so {{Str gtr str|Romeo|juliet|true|false}} returns false
Only the first four characters of the strings are analysed, so that (for example) {{Str gtr str|Wikipedia|Wikicommons|true|false}} returns false. ASCII characters outside the range 32-126 are treated as a space.