#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < (n);i++)
#define sz(x) int(x.size())
typedef long long ll;
typedef long double ld;
typedef pair<int,int> P;
typedef pair<ll, int> PL;
constexpr int INF = 2e9;

int main() {
  int n, d;
  cin >> n >> d;
  vector<int> a(n, 0);
  rep(i,n - 1) cin >> a[i + 1];

  for (int i = 1; i < n; i++) {
    int l = a[i] - a[i - 1];
    if (l >= d) continue;
    a[i] = a[i - 1] + d;
  }
  for (int i = 0; i < n; i++) {
    cout << a[i];
    if (i < n - 1) cout << " ";
  }
  cout << endl;
  return 0;
}