compare two file in sd card . Mikroc Pro

Hi all what i have and use : - 1- Mikroc Pro 5.6 2- PIC18f45k22 or PIC18f4520 ..... ( the freelance can work with any 18 family , but the function should work for these PIC's) What I need is that : - On the SD card i have 2 file , file1 and file2 .. in each file there are random line of data .....for exmaple , 10 line , 20 line, 22 line etc .. not fixed ..... also the length also no fixed for example , 232425 24354 22 1 2423 and same for for both file , also it may have for example 20 line in file1 and 10 in file2 it is random ! I need to take each line and compare it with all value in file , if match found , OK go to next line in file2 and chick it with file1 ... If no match found the function should return Line number (2,5,6,.. etc.... ) and the value for the line example (21134,12342,123) and write in UART .... this what I ask , 00000000 note : please note that if for example i have fixed line's in both file it easy to do it , using for example file1[200] and file2[200]. it easy to do it and compare two array , the issue is that RAM of PIC have no enough memory to save for example 70 line in file 1 and 70 in file2 .. i will provide the files (file1 and file2 for the bidder ) Important ::::::::::::::::::: the freelancer should have the sd card and development kit to test his code , please if you don not have please do not Pide in the project .. regards for all