Sorting using two field separators

[tolugboji]

I am debugging iteratively using the following

echo "*"
find "$fdir" -type f -name "${fnam}-*.png" -print0 | cat -vet
echo
echo "**"
find "$fdir" -type f -name "${fnam}-*.png" -print0 | awk -F'[-.]' '{print 
$(NF-1)+0, $0}' RS='\0' ORS='\n' | cat -vet
echo

*
/home/flora/edvart/docs/schimmel-04.png^@/home/flora/edvart/docs/schimmel-05.png^@/home/flora/edvart/docs/schimmel-06.png^@/home/flora/edvart/docs/schimmel-07.png^@/home/flora/edvart/docs/schimmel-08.png^@/home/flora/edvart/docs/schimmel-09.png^@/home/flora/edvart/docs/schimmel-10.png^@/home/flora/edvart/docs/schimmel-11.png^@/home/flora/edvart/docs/schimmel-12.png^@/home/flora/edvart/docs/schimmel-13.png^@/home/flora/edvart/docs/schimmel-1.png^@/home/flora/edvart/docs/schimmel-2.png^@/home/flora/edvart/docs/schimmel-3.png^@
**
4 /home/flora/edvart/docs/schimmel-04.png$

/home/flora/edvart/docs/schimmel-04.png