[Proj] Help me, program proj

[RENATO GRAZIOLI]

Blank 
I am one student of the polytechnic of Milan.  
Recently I have unloaded on situated www.remotesensing.org\proj the program "proj446 win32 bin.zip" that it allows me to pass from a DATUM NAD27 to a DATUM NAD83.  In this program they are contained of file.lla (the example:  conus.lla, FL.lla etc.); I wanted to know that type of rows is, like I have been produced and structured and the meant one of the numbers to the Distinguished inside of file.lla 
Sure of one the ready answer 

Distinguished salutes  Grazioli Alberto
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