use strict;
use warnings;
$_ = "T1 CONT 11 100.00 0 0.00 | T2 IEB 11 100.00 0 0.00 | T3 IEB 11 100.00 0 0.00 | ".
		"T4 ICBO 11 100.00 0 0.00 | T5 ICBO 11 100.00 0 0.00 | T6 BVEB 11 100.00 0 0.00 | ".
		"T7 VFBE 11 100.00 0 0.00 | T8 VFBE 11 100.00 0 0.00";

# dirty grep with side effects...
print grep { (/^\s*T(\d+)/)[0] % 2 ? !print : 1 } split /[|]/;