course_id,prereq_id
133,852
158,408
169,603
209,780
224,227
236,984
239,628
241,486
242,304
242,594
254,877
258,137
272,275
276,403
292,399
313,731
324,408
324,857
338,133
338,852
349,612
353,647
353,694
359,694
359,818
362,242
362,696
376,130
392,875
399,664
403,345
403,352
411,401
443,852
457,544
458,696
486,371
496,416
496,443
496,489
544,254
544,702
545,318
545,947
558,130
559,500
582,487
586,468
591,403
603,735
608,421
608,864
612,123
618,352
628,340
629,139
631,681
634,864
647,792
656,559
656,659
663,998
664,489
664,704
692,426
692,761
692,774
694,254
696,101
704,416
747,272
747,927
760,169
774,258
774,769
780,345
792,814
793,791
795,123
802,666
804,947
805,774
810,966
820,371
830,748
841,818
843,324
852,133
852,267
864,634
875,458
877,599
902,130
947,494
958,139
958,735
958,969
972,958
991,598
998,319