Because of the COVID-19 pandemic, Professor Lily has decded that his students will self-grade and self-report the scores on their assignments. Professor Lily has a class of ~N~ students, numbered ~1~ to ~N~, whom he has asked to self report the scores they received on an assignment with maximum score ~M~.

Can you determine which students failed to report their score correctly?

Input Specification

The first line of input contains two integers ~N~ and ~M~, ~(1 \le N,M \le 100)~.

The second line of input contains an integer ~S~ the number of test scores Professor Lily received, ~(1 \le S \le 1000)~.

The next ~S~ lines contain two positive integers ~x_i~ ~(1 \le x_i \le N)~ and ~y_i~ ~(0 \le y_i \le 100)~, denoting that that student ~x_i~ has self-reported that he/she scored ~y_i~ on the assignment.

Output Specification

A single line consisting of a list of space separated integers, in increasing order, the students that did not submit their assignment correctly.

Sample Input 1

5 10
5
1 11
3 8
4 3
5 8
5 7

Sample Output 1

1 2 5

Sample Input 2

6 6
6
3 5
1 0
4 3
3 5
5 7
6 2

Sample Output 2

2 5