from_stop_id,to_stop_id,transfer_type,min_transfer_time 20001013,20001013,1, 20001149,20001149,1, 20001407,20001407,1, 20001489,20001768,0, 20001489,20001769,0, 20001768,20001489,0, 20001768,20002160,0, 20001769,20001489,0, 20001769,20002160,0, 20002160,20001768,0, 20002160,20001769,0, 20002372,20002372,1,