#include <iostream>

int main()
{
    int a, b;
    while (std::cin >> a >> b)
    {
        while (a > b)
        {
            int c = a;
            a = b;
            b = c;
        }
        while (a < b)
            std::cout << (a++) << ' ';
        std::cout << a << '\n';
        // break;
    }
}