while(<DATA>){$q[($.-1)%4]=$_;print $q[0] if (($.-1)%4==3)&&(m/ord/s)}

__DATA__
# input 1
xxx
yyyy
ord
# input 2
xxx
yyy
1
# input 3
xxx
yyy
ord

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By a scallop's forelocks!

In reply to Re: print matching lines by Adrade
in thread print matching lines by Anonymous Monk

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