func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int count[26] = {0}, c = 0, i;     string str;     getline(cin, str);     for (i = 1; i <= str.length() - 1; i++) {       if (str[i] ==  }  || str[i] ==  , ) count[str[i - 1] -  a ]++;     }     for (i = 0; i <= 25; i++)       if (count[i] > 0) c++;     printf( %d n , c);   }   