You're given strings?jewels?representing the types of stones that are jewels, and?stones?representing the stones you have. Each character in?stones?is a type of stone you have. You want to know how many of the stones you have are also jewels.

Letters are case sensitive, so?"a"?is considered a different type of stone from?"A".

?

Example 1:

Input: jewels = "aA", stones = "aAAbbbb"Output: 3

Example 2:

Input: jewels = "z", stones = "ZZ"Output: 0

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Constraints:

• 1 <=?jewels.length, stones.length <= 50

• jewels?and?stones?consist of only English letters.

• All the characters of?jewels?are?unique.

Runtime:?3 ms, faster than?32.45%?of?Java?online submissions for?Jewels and Stones.

Memory Usage:?42.7 MB, less than?15.42%?of?Java?online submissions for?Jewels and Stones.