Как отсортировать слова по длине?

echo "$var"  | xargs -n1 | while read w ; do echo ${#w} $w ; done | sort -nr | awk '{print $2}' | xargs echo

for w in $var ; do echo ${#w} $w ; done | sort -nr |  awk '{printf("%s ",$2)}'  

$ echo "fh stuj h rso8gd yqs" | awk 'BEGIN { RS="[ \n]"; PROCINFO["sorted_in"] = "@ind_num_desc" } { a[length] = a[length] $0 " " } END { for (k in a) printf("%s", a[k]) }'
rso8gd stuj yqs fh h 

var="fh stuj h rso8gd yqs"
echo $var | perl -ape '$_=join" ",sort{length($b)<=>length($a)}@F'
# rso8gd stuj yqs fh h

strings = 'fh stuj h rso8gd yqs'.split()
strings.sort(key=len, reverse=True)
print(strings)
# ['rso8gd', 'stuj', 'yqs', 'fh', 'h']

echo 'fh stuj h rso8gd yqs'| python3 -c "print(' '.join(sorted(input().split(), key=len, reverse=True)))"