--- PASS: THESE LINES SHOULD MATCH --- 128.208.3.88 192.168.0.255 10.0.0.1 255.255.255.255 123.456.789.012 1.2.3.4 0.0.0.0 --- FAIL: THESE LINES SHOULD NOT MATCH --- 128 208 123 188 128.208 3.88 1..2..3..4 1234.1234.1234.1234 128.208.3.88.101 128.208.3 abc.123.you.nme 42 Marty McFly