0000000000000000000000000000000000000000 ccf29d3c1f8b8c8435d41915b92c7adc902675bd ShidaJingTetra <jingshid@grinnell.edu> 1619292898 -0500	branch: Created from master
ccf29d3c1f8b8c8435d41915b92c7adc902675bd bfa96e93f04884e5bb6c5705930217768ea167d9 ShidaJingTetra <jingshid@grinnell.edu> 1619295329 -0500	commit: Cleaning parser and scanner
