func_code_string: #include <bits/stdc++.h>   using namespace std;   int rem = 10;   set<char> st;   int main() {     string s;     cin >> s;     long long ans = 1;     int zeroes = 0;     for (int i = 0; i < s.size(); i++) {       if (s[i] >=  0  && s[i] <=  9 ) continue;       if (s[i] ==  ? ) {         if (i == 0)           ans *= 9;         else           zeroes += 1;       } else {         if (st.count(s[i])) continue;         st.insert(s[i]);         if (i == 0)           ans *= 9;         else           ans *= rem;         rem--;       }     }     cout << ans;     while (zeroes) {       cout <<  0 ;       zeroes--;     }     return 0;   }   