Need the field that follow specific word

[toomee]

I have data like this,

a,1,b,2,c,3,d,4,e,5
a,11,b,12,c,13,d,14
b,21,c,22,d,23
a,31,b,32,d,33

I need only the fields that follow b and d like,

2|4
12|14
21|23
32|33

Could anyone help me?
Thank you

 

[PHV]

Something like this ?
awk -F',' '{
b="";d=""
for(i=1;i<NF;++i){
if($i=="b")b=$(i+1)
if($i=="d")d=$(i+1)
};printf "%s|%s\n",b,d
}' /path/to/inputfile

Hope This Help, PH.
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