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