#include<stdio.h>
int Cal(char a[15],char b)
{
int i;
int sum = 0;
for(i = 0;a[i] != '\0';i++)
{
if(a[i] == b)
{
sum = sum * 10 + (b - '0');
}
}
return sum;
}
int main()
{
char a[15],b[15];
char da,db;
scanf("%s %c %s %c",&a,&da,&b,&db);
int pa = Cal(a,da);
int pb = Cal(b,db);
printf("%d\n",pa+pb);
return 0;
}
int Cal(char a[15],char b)
{
int i;
int sum = 0;
for(i = 0;a[i] != '\0';i++)
{
if(a[i] == b)
{
sum = sum * 10 + (b - '0');
}
}
return sum;
}
int main()
{
char a[15],b[15];
char da,db;
scanf("%s %c %s %c",&a,&da,&b,&db);
int pa = Cal(a,da);
int pb = Cal(b,db);
printf("%d\n",pa+pb);
return 0;
}