a'bcd 1%_
#include<iostream>
#include<string>
#include<algorithm>
//ru.cppreference.com/w/cpp/algorithm/count
using namespace std;
int main()
{
string s = "Asdk6949_glsjg+()(& *&%^%$df gdfg e$T#%Y KNUYNL GIK5654";
cout << count_if(s.begin(), s.end(), ::isalpha) << endl;
}