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Somehow, my post came on top of the thread instead of the last post, whereas post #2 is the original post.. Hmm.. No sure how to correct this...
Have not got time for it now...

Post #2 is the original post. This is the first answer to post #2


Hi, try:

awk '
{
match($0,/1+/)
b=substr($0,1,RSTART-1)
e=substr($0,RSTART+RLENGTH,length)
...