#include <iostream>

using namespace std;

int main()
{
int n,i,bp,bn;
cin>>n;
bp=0;
bn=0;
while(n>0){
i=n%10;
if(i%2==0)bp=bp+i;
else
bn=bn+i;
n=n/10;
}
cout<<bp*bn;
return 0;
}