1 #include <cstdio>
 2 #include <cstring>
 3 #include <cmath>
 4 #include <iostream>
 5 #include <algorithm>
 6 #include <string>
 7 #include <cstdlib>
 8 
 9 using namespace std;
10 
11 int work(char *x)
12 {
13     int len,i,sum=0;
14     len=strlen(x);
15     for(i=0;i<len;i++)
16     {
17         if(x[i]>=‘A‘&&x[i]<=‘F‘) sum=sum*16+(x[i]-‘A‘+10);
18         if(x[i]>=‘a‘&&x[i]<=‘f‘) sum=sum*16+(x[i]-‘a‘+10);
19         if(x[i]>=‘0‘&&x[i]<=‘9‘) sum=sum*16+(x[i]-‘0‘);
20     }
21     return sum;
22 }
23 
24 int main()
25 {
26     char a[1000],b[1000];
27     while(~scanf("%s %s",a,b))
28         printf("%d\n",work(a)+work(b));
29 }