counter=0

for EveryLine in `cat input.txt`
do
  let counter=counter+1
  let now=counter%10
  if [ $now -eq 0 ]; then
    count=10
    echo $EveryLine | sed -r "s/^([^,]*),(.*)$/\1,$count,\2/"
  fi
  if [ $now -ne 0 ]; then
    count=$now
    echo $EveryLine | sed -r "s/^([^,]*),(.*)$/\1,$count,\2/"
  fi
done