d = dict()
elements = [1, 2, 3, 4, 3, 6, 3, 8]
for i, element in enumerate(elements):
if elements.count( element ) > 1:
d[element] = i
for j in d.values():
elements.pop( j )
print elements
ZCA9IGRpY3QoKQplbGVtZW50cyA9IFsxLCAyLCAzLCA0LCAzLCA2LCAzLCA4XQoKZm9yIGksIGVsZW1lbnQgaW4gZW51bWVyYXRlKGVsZW1lbnRzKToKICAgaWYgZWxlbWVudHMuY291bnQoIGVsZW1lbnQgKSA+IDE6CiAgICAgICAgZFtlbGVtZW50XSA9IGkKICAgICAgICAgIApmb3IgaiBpbiBkLnZhbHVlcygpOgogICBlbGVtZW50cy5wb3AoIGogKQogICAKcHJpbnQgZWxlbWVudHM=