from_stop_id,to_stop_id,transfer_type,min_transfer_time
1507,1508,1,
1503,1509,1,
1502,1508,1,
1503,1506,1,
1502,1511,1,
1502,1503,1,
1503,1504,1,
1507,1503,1,
1503,1507,1,
1502,1500,1,
1502,1506,1,
1503,1501,1,
1503,1510,1,
1503,1502,1,
1507,1507,1,
1502,1509,1,
1502,1501,1,
1503,1500,1,
1503,1511,1,
1502,1510,1,
1502,1504,1,
1507,1502,1,
1503,1508,1,
1502,1507,1,
