1 #include<iostream>
 2 
 3 using namespace std;
 4 
 5 int main() {
 6     string a, b;
 7     char da, db;
 8     int pa = 0, pb = 0;
 9     cin >> a >> da >> b >> db;
10     for (int i = 0; i < a.size(); i++) {
11         if (a[i] == da) {
12             pa = pa * 10 + (da - ‘0‘);
13         }
14     }
15     for (int i = 0; i < b.size(); i++) {
16         if (b[i] == db) {
17             pb = pb * 10 + (db - ‘0‘);
18         }
19     }
20     cout << pa + pb;
21     return 0;
22 }

 1 def count(num, d):
 2     k = 0
 3     for i in num:
 4         if i == d:
 5             k += 1
 6     if k == 0:
 7         return 0
 8     else:
 9         return int(k * d)
10 
11 a, da, b, db = input().split() 
12 print(count(a, da) + count(b, db))