BEGIN{print "---------- This is the beginning.";}
FNR == 1 {prevfilenum = filenum; ++filenum;}
prevfilenum != filenum {print "---------- New file starting:", filenum;}
{print $3; prevfilenum = filenum;}
#NR == FNR {print "first:", $3;}
#NR != FNR {print "second:", $3;}
END{print "---------- This is the end.";}