#include <iostream>

using namespace std;

int main()

{

cin.tie(nullptr);

cout.tie(nullptr);

ios::sync_with_stdio(false);

int arr[21];

for (int i = 1; i <= 20; i++)

arr[i] = i;

for (int i = 0; i < 10; i++)

{

int a, b;

cin >> a >> b;

for (int i = 0; i <= (b - a) / 2; i++)

{

int t = arr[a + i];

arr[a + i] = arr[b - i];

arr[b - i] = t;

}

}

for (int i = 1; i <= 20; i++)

cout << arr[i] << " ";

return 0;

}