040000 tree 52e2bbc44fe06e7c2c83cfc8f5f6de8e62550efe	counted.iterator
040000 tree 8404ef49e8859f86b689820cd6acdcdbdb1c8a4d	default.sentinel
040000 tree 54aee27f4a99c99214055ca728c42406acdbb335	insert.iterators
040000 tree 01aea9ad2b507db41965ee97c67272201316a5f5	iterators.common
040000 tree aab443b69f73e0d755c64d55bedd805b0d37fa48	move.iterators
040000 tree 5c0a9efa8b5a116b831649a6a0d87a03add929f4	reverse.iterators
040000 tree 6b0001f71fe1e896540536dd7ad80da1f9169466	unreachable.sentinel