from_stop_id,to_stop_id,transfer_type,min_transfer_time
7_01,7_01,0,
25_01,25_01,0,
31_01,31_02,0,
31_02,31_01,0,
31_02,31_02,0,
31_02,31_03,0,
31_03,31_02,0,
34_01,34_01,0,
33_01,33_01,0,
39_01,39_01,0,
