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#23870. 統計元音字母

統計

畀定一個由細楷英文字母組成、長度係 $N$ 嘅字串 $S$。請計出 $S$ 入面元音字母嘅數量,即係 a、i、u、e、o 嘅數量總和。

輸入格式

輸入由標準輸入以以下格式畀出:

$$ \begin{aligned} &N \\ &S \end{aligned} $$

輸出格式

輸出 $S$ 入面元音字母嘅數量,即係 a、i、u、e、o 嘅數量總和。

數據範圍

  • $1 \le N \le 50$。
  • $S$ 係長度為 $N$ 嘅字串。
  • $S$ 嘅每個字元都係細楷英文字母。

樣例

輸入格式 1

8
joiyosen

輸出格式 1

4

說明 1

  • 元音字母係 _oi_o_e_,總共有 $4$ 個。

輸入格式 2

6
bitaro

輸出格式 2

3

說明 2

  • 元音字母係 _i_a_o,總共有 $3$ 個。

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