Consider this checking out the $/ - input record separator in
perlvar.
#!/usr/bin/perl
use strict;
local $/ = "\n\n";
while (<DATA>) {
print if ( ! /^r145/ );
}
__DATA__
c114: 0245, 0456, 1545
2555, 2444, 0344
0444, 3434, 1434
r145: 0544, 0688, 2988
1332, 0221, 0867
0655, 4548, 7463
c12: 2322, 0556, 3998
3545, 2002, 4500
5650, 0830, 3324
3433, 7070, 3404
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