3136. Valid Word

A word is considered valid if:

• It contains a minimum of 3 characters.
• It consists of the digits 0-9, and the uppercase and lowercase English letters. (Not necessary to have all of them.)
• It includes at least one vowel.
• It includes at least one consonant.

You are given a string word.

Return true if word is valid, otherwise, return false.

Notes:

• 'a', 'e', 'i', 'o', 'u', and their uppercases are vowels.
• A consonant is an English letter that is not a vowel.

class Solution {
public:
    bool isValid(string word) {
        unordered_set<char> v{'a','e','i','o','u','A','E','I','O','U'};
        bool vo = 0, vvo = 0;
        if(word.size() < 3) return false;
        for(auto& ch : word) {
            if(isdigit(ch)) continue;
            if(!isalpha(ch)) return false;
            if(v.count(ch)) vo = true;
            else vvo = true;
        }
        return vo and vvo;
    }
};