There are so many ways to do this. Maybe straightforward,
don't print until $. is 4 (see perlvar
next if $. <4;
Update: I couldn't resist adding some more possibilities:
#1 slurping the whole thing in memory, and splice
@file = <>;
splice @file, 0, 4;
#2 using the flip-flop operator
next unless $.>3 .. 1;
#3 another flip-flop
$start = -3;
next unless $start++ .. 1;
#4 just repeat 4 times
$dummy=<> for 1..4;
#5 make it multifile proof
close( ARGV) if (eof);
next unless $.>3 .. eof;
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