#include<iostream>
#include<algorithm>
using namespace std;
int main(){
    int x,y;

    while(cin>>x>>y){
        if(x<=0||y<=0) break;
        int sum=0;
        if(x>y) swap(x,y);
        for(int i=x;i<=y;i++){
            sum+=i;
            cout<<i<<" ";
        }
        cout<<"Sum="<<sum<<endl;

    }
    return 0;
}

注意处理当x或y小于或者等于0时，循环就要停下