field1=value1, field2=value2, field3=value3
field1=value1a, field2=value2a, field3=value3a

##</code><code>##

value1 value2 value3
value1a value2a value3a

##</code><code>##

cat file.txt | perl -ne 'm!.*=(.*),.*=(.*),.*=(.*)!; print "$1 $2 $3\n"'