#include <iostream>
#include <string>
#include <cstdlib>

using namespace std;


int main()
{
    string foo = "aaaaaaa1";

    int count=0;

    for (int i=0;i<foo.length();i++)
    {
        if ( isalpha(foo[i]))
        {
            count++;
        }
    }

    cout<<count;
}