#include <iostream>
 
void Print1(int a, int b)
{
    while(a < b)
        std::cout << a++ << ' ';
    while(a > b)
        std::cout << a-- << ' ';
    std::cout << a << std::endl;
}
void Print2(int a, int b)
{
	int incr = 1 - 2 * ((b - a) < 0);
	while(a != b)
	{
        std::cout << a << ' ';
        a += incr;
	}
    std::cout << a << std::endl;
}
 
int main() 
{
	int a, b;
	std::cin >> a >> b;
	Print1(a, b);
	Print2(a, b);
	return 0;
}

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

MSAxMA==

1 10