University of Byteland introduce a new way to count the attendance of students. They provide all the students with an unique ID card. Daily each student have to swipe their ID card in a machine to attend the class.
University have the data of last one month stored in a table Attendance. They asked you find out how many unique students attended any class in last one week including today's attendance.
NOTE: Today's date is 2016-12-17.
The output table should be ordered by Student names in lexicographically increasing order.
Table : Attendance
Sample Attendance Table: