from_stop_id,to_stop_id,transfer_type,min_transfer_time
168_01,168_01,0,
168_01,168_02,0,
121_01,121_03,0,
121_02,121_03,0,
121_03,121_01,0,
121_03,121_02,0,
113_01,113_01,0,
113_02,113_02,0,
135_02,135_01,2,30
135_01,135_01,0,
135_02,135_02,0,
136_01,136_02,0,
