100644 blob 968446cc164d8756f8680ea6d257d69271cf0e0e	part1_test.py
100644 blob d3815522e0ca1ed70c78b911f5afb342ddcce6fe	part2_test.py
100644 blob e5563ca05b0be16e8b545ce668d0159e852b845f	part3_test.py
040000 tree 79557f39fa75c622eb8da6dc78ea8ff980d4f9f0	ref