N = int(raw_input())
A = [int(raw_input()) for i in xrange(N)]

if N == 1:
        if A[0] == 0:
                print -1
        else:
                print 0
        exit()

hist = [0] * 50
for a in A:
        hist[a] += 1

if N in hist:
        print -1
        exit()

priority = sorted([[h, i] for i, h in enumerate(hist[:N])], reverse = True)
used = [False] * N
ans = [-1] * N
for h, i in priority:
        for j in xrange(N):
                if A[j] != i and not used[j]:
                        ans[j] = i
                        used[j] = True
                        break
        else:
                for j in xrange(N):
                        if not used[j]:
                                ans[j] = i
                                used[j] = True
                                break

if -1 not in ans:
        for a in ans:
                print a
else:
        print -1