#include<bits/stdc++.h>
#include <unordered_map>

using namespace std;
int countConsistentStrings(string allowed, vector<string>& words) {
    bool flg = true;
    int counter = 0;
    unordered_map<char,int>mp;
    for (auto a : allowed) {
        mp[a]++;
    }
    for (auto word : words) {
        flg = true;
        for (auto ch : word) {
            if (mp[ch] == 0) {
                flg = false;
            }
        }
        if (flg == true) counter++;
   }
    return counter;
}
int main()
{
    string allowed = "abc";
    vector<string>words = { "a","b","c","ab","ac","bc","abc" };
    cout << countConsistentStrings(allowed, words);
}