Question: **Has to be in C++ 3.1 Word Strings Write a function is_word with the following signature: bool is word(string s) that returns true is s
**Has to be in C++

3.1 Word Strings Write a function is_word with the following signature: bool is word(string s) that returns true is s is a word, and false otherwise. A word is defined as only having the characters a-zA-Z and nothing else all lowercase, capitalized or all uppercase (eg. test, Test, TEST) at least one character long
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