#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
using namespace std;
 
 
 
 
int main()
{
    int A, B;
    int sum = 0;
 
    while (cin>>A>>B) {
 
 
 
 
        if (A <= 0 ||B <=  0) {
            break;
        }
        int start = min(A, B);
 
        int end = max(A, B);
 
        for (int i = start; i <= end; i++) {
 
            sum += i;
 
            cout << i << " ";
        }
 
 
 
 
    }
    cout << "sum =" << sum << endl;
 
 
 
 
 
        return 0;
 
}

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