N,D = map(int,input().split())
a = list(map(int,input().split()))
a.insert(0,0)
print(0,end = " ")
for i in range(1,N):
    if a[i] - a[i-1] < D:
        a[i] = a[i-1] + D
        print(a[i],end = " ")
print()