040000 tree 85fc0200160df89f3e56ce2d9c2c9757e55525ef	istream.formatted.arithmetic
040000 tree b43f40f7428c5f6d116709938869e52b519c89c9	istream.formatted.reqmts
040000 tree f550d7eb2f40f3b2853f39478541dce735141131	istream_extractors