From the book 'Healing Mantras' by Thomas Ashley-Farrand 'Om Trayumbakam Yajamahe Sughandhim Pushti Vardanam Urvar-ukamiva Bandhanan Mrityor Muksheeya Mamritat
'Shelter me, O three-eyed Lord Shiva. Bless me with health and immortality and sever me from the clutches of death, even as a cucumber is cut from its creeper.'
Don't get hung up on 100% accuracy - enjoy the mantra and chant as you will. Shiva will appreciate the effort - not punish the mistakes. Hey, it's my belief anyway. Enjoy! Shanti