How many pairs of letters are there in the word 'CASTRAPHONE' which have as many letters between
them in the word as in the alphabet?  Choose the correct answer.
A) 8	B) 7	C) 6	D) 4	E) 3
Looking into the alphabets there are four such pairs namely ON,EH,ST,TO.   Answer: 4
<result>D</result>
How many pairs of letters are there in the word 'CASTRAPHONE' which have as many letters between
them in the word as in the alphabet?