from_stop_id,to_stop_id,transfer_type,min_transfer_time
101_01,101_02,0,
101_01,101_03,0,
101_01,101_07,0,
101_02,101_01,0,
101_02,101_03,0,
101_02,101_07,0,
101_03,101_01,0,
101_03,101_02,0,
101_03,101_04,0,
101_03,101_07,0,
101_04,101_03,0,
101_04,101_05,0,
101_04,101_06,0,
101_04,101_07,0,
101_05,101_04,0,
101_05,101_06,0,
101_05,101_07,0,
101_06,101_04,0,
101_06,101_05,0,
101_06,101_07,0,
101_07,101_01,0,
101_07,101_02,0,
101_07,101_03,0,
101_07,101_04,0,
101_07,101_05,0,
101_07,101_06,0,
