**Example 1**

**Input**

5

1 2 3 4 5

**Output**

one

**Explanation**

1 -> one -> o, e

2 -> two -> o

3 -> three -> e, e

4 -> four -> o, u

5 -> five – > i, e

Thus, count of vowels in textual representation of numbers in input = {2 + 1 + 2 + 2 + 2} = 9. Number 9 is the digit D referred to in section above.

Now from given list of number {1,2,3,4,5} -> find all pairs that sum up to 9.

Upon processing this we know that only a single unordered pair {4, 5} sum up to 9. Hence the answer is 1. However, output specification requires you to print textual representation of number 1 which is one. Hence output is one.

Note: – Pairs {4, 5} or {5, 4} both sum up to 9. But since we are asking to count only unordered pair, the number of unordered pair is this combination is only one.

**Example 2**

**Input**

3

7 4 2

**Output**

zero

**Explanation**

7 -> seven -> e, e

4 -> four -> o, u

2 -> two -> o

Thus, count of vowels in textual representation of numbers in input = {2 + 2 + 1} = 5. Number 5 is the digit D referred to in section above.

Since no pairs add up to 5, the answer is 0. Textual representation of 0 is zero. Hence output is zero.