from_stop_id,to_stop_id,transfer_type,min_transfer_time
119,219,2,180
219,119,2,180
123,305,2,180
305,123,2,180
125,402,2,180
402,125,2,180
208,301,2,180
301,208,2,180
233,313,2,180
313,233,2,180
309,401,2,180
401,309,2,180
