from_stop_id,to_stop_id,transfer_type
101_01,101_02,
101_01,101_03,
101_02,101_01,
101_02,101_03,
101_03,101_01,
101_03,101_02,
127_01,127_01,
146_01,146_02,
146_01,146_03,
146_02,146_01,
146_02,146_02,
146_02,146_03,
146_03,146_01,
146_03,146_02,
