func_code_string: #include <bits/stdc++.h>   using namespace std;   string s;   bool vis[26];   int main() {     cin >> s;     long long ans = 1;     int cnt1 = 0;     int cnt2 = 0;     memset(vis, 0, sizeof(vis));     for (int i = 0; i < s.size(); i++) {       if (s[i] ==  ? )         cnt2++;       else if (s[i] >=  A  && s[i] <=  Z ) {         if (vis[s[i] -  A ] == 1)           continue;         else           vis[s[i] -  A ] = 1, cnt1++;       }     }     if (cnt1)       if (s[0] >=  A  && s[0] <=  Z )         ans = 9;       else         ans = 10;     for (int i = 9; i > 9 - cnt1 + 1; i--) ans *= i;     if (cnt2)       if (s[0] ==  ? )         ans *= 9;       else         ans *= 10;     for (int i = 1; i < cnt2; i++) ans *= 10;     cout << ans << endl;     return 0;   }   