Categorize the days of the week between weekdays and weekend.
Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
weekdays - Monday, Tuesday, Wednesday, Thursday, Friday
weekends - Saturday, Sunday
<START_INST>Categorize the days of the week between weekdays and weekend.
Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday<END_INST><START_CTX><END_CTX><START_A>weekdays - Monday, Tuesday, Wednesday, Thursday, Friday
weekends - Saturday, Sunday<END_A>