UNIX for Dummies Questions & Answers

$ awk '{sub (/^../, "&|", $3); sub (/..$/, "|&", $3); sub (/^../,"&|", $4); print}' FS="|" OFS="|" file
asdas|csada|13|03|10|04|23|A1|canberra
sdasd|sfdsf|13|04|26|23|28|A1|sydney

$ awk '{split ($3$4,T,""); $3=T[1]T[2] FS T[3]T[4] FS T[5]T[6]; $4=T[7]T[8]FS T[9]T[10]}1' FS="|" OFS="|" file

awk 'BEGIN{FS=OFS="|"} {for(i=1;i<=NF;i++) {if(i==3||i==4) {gsub("..","&|",$i); sub("\\|$","",$i)}} print}' filename

awk -F\| '{for(i=1;i<=NF;i++){if(i==3||i==4) gsub("..","&|",$i);sub("[|]$","",$i)};OFS="|";print}' file