unix - How to use pipe within -exec in find -

Is there any way to find any -ACAC pipe? I do not want to go through the whole file of grep, but only through the first line of each file

  find / path / to / dir -type fprint -exec grep yourstring {} \;   
 I tried to put pipelines with "cat" and "head-1", but it does not work very well. I tried to use brackets in some way, but I did not manage the management to fix it. I would be very grateful for your help. I know how to work in other ways without using it, but we Tried to find it in school and with pipeline use, but how could it not manage    Find / Path / From / Direct Type f -print -exec Bill {} | Head-1 Your string grep;   
 This is how we have tried to do somehow, but can not manage the bracket and it is also possible that this is also possible. I tried to look through the net, but no answer was found.   
 
 
 Use a pipe to be enabled, give you an  shell  command There is a need to execute, that means the command with the pipeline should have a command for  -exec .  
  find / path / to / dial type F-print-xac sh -c "cat {} | head-1 | gffirstring" \;   
 Note that there is an  unused use cat  above, which can be written as:  
  find / path / From / Dir -type f -print -exec sh -c "head -1 {} | grep yourstring" \;   
 
 Another way to get what you want will be to say:  
  find / path / to / direct type F-print-xac Awk 'NR == 1 & amp; Amp; / Yourstring / '{} \;