9357번 - Eligibility 다국어

Regional Contest Director Osama Ismail knows that an individual cannot participate in the regional contest more than 5 times. Given a list of contestant names and the previous years they participated in, print which contestant is eligible.

The first line of the input contains a single integer T representing the number of the test cases

The first line of each test case contains a single integer N

N lines follow in this test case each having the format "Name Year" denoting that contestant Name participated in a regional contest in year Year

• T ≤ 100
• 0 ≤ N ≤ 500
• Name is sequence of lowercase English letters, spaces and contains up to 20 characters 
• 1970 ≤ Year ≤ 2070

Note that since he collected the data from multiple sources it may contain duplicate records (if a contestant X have competed in year Y, you might find multiple lines "X Y" in the same test case)

For each test case, print a line containing the test case number as formatted in the sample and then for each eligible contestant print his\her name on a single line and note that you must print the names of the contestants in lexicographic order