040000 tree 24feb4c33e499ff288187d49edd68b4edeb2953a	census
100755 blob 2a8d9fab93a5e4b83567e16a443b836c68afc919	gen_build_yaml.py
040000 tree 48bffc40c4579f7c50b4c2709e845755a5cefdcc	grpc
040000 tree 20fdccc4302c3ab59cba6fce749f4d3e827d503a	math