Oleh's Lotto Tickets#537
Oleh loves playing the lottery. When he does, he buys many tickets. Each ticket contains unique numbers in the range from to inclusive. Oleh wants to "cover all the bases." This means that each set of lottery tickets must include every number from to at least once on some ticket. Write a program to help Oleh check whether his tickets "cover all the bases."
The input file consists of several test cases. Each case starts with an integer (1 \le N \le 100), indicating the number of tickets Oleh has purchased. The next lines contain the tickets, one per line. Each ticket contains exactly integers, all in the range from to inclusive. No ticket has duplicate numbers, but the numbers on a ticket may be in any order. The input ends with a line containing only "".
Print a list of answers for the input sets, one per line. Print the word "Yes" if every number from to inclusive appears on some lottery ticket in the set, and "No" otherwise. Print these words exactly as shown. Do not print any blank lines between outputs.
Example 1