Finding the three longest substrings in a string using SPARQL on the Wikidata Query Service, and ranking them across strings

Question

I'm trying to identify the longest three substrings from a string using SPARQL and the Wikidata Query Service and then rank

• the substrings within a string by length
• the strings by the lengths of any of those longest substrings .

I managed to identify the first and second substring from a string and could of course just create similar additional lines to tackle the problem, but this seems ugly and inefficient, so I am wondering if anyone here knows of a better way to get there.

This is a simplified version of the code, though I have left some auxiliary variables in that I am using for tracking progress on the way. You can try it here.

Clarification in response to this comment: if it is necessary to treat this query as a subquery and to feed it with results from another subquery, that's fine with me. To get an idea of the kinds of use I have in mind, see this demo.

SELECT * WHERE {
  {
    VALUES (?title) {
      ("What are the longest three words in this string?")
      ("A really complicated title")
      ("OneWordTitleInCamelCase")
      ("Thanks for your help!")
    }
  }
  BIND(STRLEN(REPLACE(?title, " ", "")) AS ?titlelength)
  
  BIND(STRBEFORE(?title, " ") AS ?substring1)
  BIND(STRLEN(REPLACE(?substring1, " ", "")) AS ?substring1length)
  BIND(STRAFTER(?title, " ") AS ?postfix)
  BIND(STRLEN(REPLACE(?postfix, " ", "")) AS ?postfixlength)
  BIND(STRBEFORE(?postfix, " ") AS ?substring2)
  BIND(STRLEN(REPLACE(?substring2, " ", "")) AS ?substring2length)
}
ORDER BY DESC(?substring1length) 

Expected results:

longsubstring   substringlength
OneWordTitleInCamelCase 23
complicated 11
longest 7
really  6
string  6
Thanks  6
title   5
three   5
your    4
help    4

Actual results:

title   titlelength substring1  substring1length    postfix postfixlength   substring2  substring2length
Thanks for your help!   18  Thanks  6   for your help!  12  for 3
What are the longest three words in this string?    40  What    4   are the longest three words in this string? 36  are 3
A really complicated title  23  A   1   really complicated title    22  really  6
OneWordTitleInCamelCase 23      0       0       0