42

n = int(input())
a = [x for x in input().split()]

ans = ''

for i in range(n-1):
    for j in range(i+1,n):
        if a[j] == a[i]:
            if "'" + a[i] + "'" not in ans:
                ans += "'" + a[i] + "'"
            break
for i in range(len(ans)):
    if i == 0:
        pass
    elif ans[i] == ans[i-1] == "'":
        pass
    elif ans[i] == "'":
        print(' ',end = '')
    else:
        print(ans[i],end = '')