head  --lines=100 RGB >  aa.txt
tail --lines=80 aa.txt > bb.txt
sed   -e "s/3:/ /g"  bb.txt > cc.txt
sed   -e "s/1:/ /g"  cc.txt > dd.txt
sed   -e "s/2:/ /g"  dd.txt > ff.txt
sort -k2n ff.txt