#include <iostream>
#include <cmath>
using namespace std;

int main() {
    int A, B;

    cout << "A: ";
    cin >> A;
    do {
        cout << "B (B > A):";
        cin >> B;
    } while (fabs(B) <= A);

    for (int i = A; i <= B; ++i) {
        for (int j = 0; j < (i - A + 1); ++j) {
            cout << i << " ";
        }
    }

    return 0; 
}