+listextract: ${listextract{ 2}{a:b:c:d}}
+listextract: ${listextract{-2}{<,a,b,c,d}{X${value}X}}
+listextract: ${listextract{ 5}{a:b:c:d}}
+listextract: ${listextract{-5}{a:b:c:d}}
+listextract: ${listextract{ 5}{a:b:c:d}{}{fail}}
+listextract: ${listextract{ 5}{a:b:c:d}{}fail}
+