Initials From a Name

Take the first letter of each word in full_name, uppercase it, and join the letters. Words are separated by one or more spaces.

Implement initials(full_name).

Input

full_name: A name made of letters and spaces.

Output

Return the initials, for example "ADL".

제약 조건

1 ≤ length of full_name ≤ 200; it contains at least one letter

예시

입력:
full_name = "Ada Lovelace"

예상 출력:
expected = "AL"

입력:
std::string full_name = "Ada Lovelace";

예상 출력:
std::string expected = "AL";

입력:
string full_name = "Ada Lovelace";

예상 출력:
string expected = "AL";

입력:
full_name = "grace  brewster  hopper"

예상 출력:
expected = "GBH"

입력:
std::string full_name = "grace  brewster  hopper";

예상 출력:
std::string expected = "GBH";

입력:
string full_name = "grace  brewster  hopper";

예상 출력:
string expected = "GBH";

참고 자료

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