#include <iostream>
using namespace std;
int main() {
// your code goes here
int b[]={5,6,4,3,6};
int n=sizeof(b)/sizeof(b[0]);
int l;
cin>>l;
int r;
cin>>r;
int sum=0;
for(int i=l;i<=r;i++){
sum+=b[i];
}
cout<<sum;
return 0;
}
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