service_id,date,exception_type
mtwtf,20200101,2
mtwtfs,20200101,2
mtwtfss,20200101,2
mtwtf,20200525,2
mtwtfs,20200525,2
mtwtfss,20200525,2
mtwtfs,20200704,2
mtwtfss,20200704,2
ss,20200704,2
sat,20200704,2
mtwtf,20200907,2
mtwtfs,20200907,2
mtwtfss,20200907,2
mtwtf,20201126,2
mtwtfs,20201126,2
mtwtfss,20201126,2
mtwtf,20201225,2
mtwtfs,20201225,2
mtwtfss,20201225,2