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15-SprPr2-80. 50786 - Top Question

CEN112 Homeworks 2013-2015

Start: Dec.15.2013 at 12:00:00 PM
Finish: Dec.15.2013 at 05:00:00 PM
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Time limit 2000/4000/4000/4000 ms. Memory limit 65000/65000/65000/65000 Kb.
Question by Ibrahim Mesecan.

Top Question

Your friend works as a teacher in a school and he organizes multiple choice exams throughout the school and he needs your support for his multiple choice exams. He records student answers in a file and he wants to see the top solved question

Question: Write a program that reads n exams for n students and it prints the top solved question.

Input specification
At the beginning, you will be given two numbers (n and m). Next line contains m space separated letters which are the correct answers of the exam. The following n lines contain the answers of n students. The student answers can be a letter from A to Z where 1 ≤ n ≤ 1,000 and 1 ≤ m ≤ 100.

Output specification
Show the number of the top solved question. Note: Show the first occurrence, if there are several questions with the same result.

Sample Input I
3 5
C E D E C
C E D B A
B E D E C
C E D E C
Sample Output I
2

Explanation: All students answered second and third questions correctly. So, the first top solved question is the second question.

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