#000093

Wovels

You are given a string S that contains N lowercase letters of the Englush alphabet. How many wovels does the string S contain? (only the letters 'a', 'e', 'i', 'o' and 'u' are considered to be wovels - letter 'y' is not considered to be a wovel)


InputFrom the first line of the standard input read an integer N (1 <= N <= 1000), N represents the length of the given string. From the second line of the standard input read N characters that represent the string S.

OutputTo the standard output, output one integer that represents the number of wovels that S contains

Inpyt:10
obhtueekxy

Output:
4
Explanation:
The only wovels in the strings are 'o', 'u' and 'e', however 'e' occurs twice, and we count it both times.

Input:5
aeiou

Output:
5

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