In the world of Latin Alphabets, there seemed to be a catastrophe! All the vowels went missing. The other alphabets got disturbed and began the search operation.
While searching they stumbled upon a garbage of letters. Can you help them find if the this garbage contains ALL the vowels ?

Input:
FIrst line contains N , the size of the garbage of letters.
Second line contains the letters (only lowercase).

Output:
Print "YES" (without the quotes) if all vowels are found in the garbage, "NO" (without the quotes) otherwise.

Constraints:
1 ≤ N ≤ 10000

SAMPLE INPUT
8
atuongih

SAMPLE OUTPUT
NO

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