Congratulations 'rg1227' you have solved the CHALLENGE. As you have found the answer is derived from the letters given are elements e.g. Ca is Calcium the 20th element and the 20th letter of the alphabet is T, likewise O is Oxygen which is the 8th element and the 8th letter of the alphabet is H ........... and so on till the secret message is uncovered. Your 3rd 'Honorary Gold Medal' is on its way :o)