n = int(input())
A = [int(input()) for i in range(n)]

if len(set(A)) == 1:
    if 0 <= A[0] <= n-1:
        print(-1)
        exit()

B = list(range(0, n))
for i in range(n):
    if A[i] == B[i]:
        for j in range(n):
            if j == i:
                continue
            if A[j] != B[i]:
                B[i], B[j] = B[j], B[i]
                break
print(*B, sep='\n')