title: search a string in a files if it match replace another string in the same line with some string
body: <pre>
  h -t 9.641909323 <b>-s 0 -d 29 -p cbr</b> -e 1078 -c 2 -a 0 -i 169 -k MAC
  r -t 9.650534114 -s 29 -d 29 -p cbr -e 1020 -c 2 -a 0 -i 169 -k MAC
  + -t 9.650544114 -s 29 -d -1 -p ACK -e 38 -c 2 -a 0 -i 0 -k MAC 
  - -t 9.650544114 -s 29 -d -1 -p ACK -e 38 -c 2 -a 0 -i 0 -k MAC
  h -t 9.650544114 -s 29 -d -1 -p ACK -e 38 -c 2 -a 0 -i 0 -k MAC
  </pre>
  
  <p>here i need to search <strong>-s 0 -d 29 -p cbr</strong>   if its match with any line on that line replace initial <strong>h</strong> with <strong>d</strong></p>