Which of these are prime triplets (p,p+2,p+6)(p, p+2, p+6)(p,p+2,p+6)?
(5,7,11)(5, 7, 11)(5,7,11)
(7,9,13)(7, 9, 13)(7,9,13)
(11,13,17)(11, 13, 17)(11,13,17)
(13,15,19)(13, 15, 19)(13,15,19)