1: 1 -> 1 2: 2 -> 4 3: 30 4: Start dump_s 5: 1 6: 2 7: End dump_s 8: Start dump_e 9: 1 10: 2 11: End dump_e 12: Start dump_s 13: Dumped 14: End dump_s 15: Start dump_e 16: Dumped 17: End dump_e 18: Start dump_s 19: 66 20: End dump_s 21: Start dump_e 22: 66 23: End dump_e