Store the length of the first string as 0
Read and store the first line
  - Read a char from stdin
  - Did we read 0 chars? If so, we got EOF (exit)
  - Update the length
  - DEBUG: print number chars read in first line
  - DEBUG: print chars read in first line
  - Is it a LF? 
     Yes - move on to next part
     No - 
       Is the buffer full? 
       Yes - print an error and exit.
       No - goto read a char from stdin

read_rest_of_file
  - Put a 0 in the place of the LF
  - Adjust str2find_len 
  - Fill the buffer with the same number of chars as the search string.
  - DEBUG: print number chars in buffer
  - DEBUG: print chars read into buffer
  - Did we read 0 chars?
    Yes - goto eof_reached
  - Did we read fewer chars than what is in search string?
    Yes - goto eof_reached

Check each char, and see if they match.
match: print message
(no_match: keep going)
re-fill buffer, check again 
  - move_everything_over by 1 char
  - Increment shift_count, which is the start position of the buffer.
  - Read another character


Recommend a DEBUG and DEBUG2 (and maybe DEBUG3) 
    ;DEBUG      equ     0         ; Flag for printing DEBUG information. (off)
    DEBUG      equ     1         ; Flag for printing DEBUG information. (on)
; ...
checkpt:        db "Check point", 0
; ...
    mov     al, 01
    test    al, DEBUG
    jz      no_message1
    mov     rdi, checkpt         ; string to print 
    call    puts                 ; puts automatically adds a newline
no_message1:


[mweeks@gsuad.gsu.edu@snowball ~]$ cat partial_h3.asm | wc -l
89
[mweeks@gsuad.gsu.edu@snowball ~]$ cat partial_h4.asm | wc -l
467