Multiple Choice

Interview

Time limit2sMemory limit512 MB

Summary

Read a student's N answers followed by the N correct answers, and count how many positions match.

Level: Easy1 of 10
Topics: Array, Implementation
Solved: No attempts yet

Problem

Your teacher likes to give multiple-choice tests. One benefit of these tests is that they are easy to grade, given an answer key. Another is that students believe they have a one-in-five chance of guessing the correct answer, since each question offers the choices A, B, C, D, or E.

Write a program that grades a single multiple-choice test.

Input

The first line contains an integer $N$ ( $0 < N < 10000$ ). It is followed by $2N$ lines: the first $N$ lines are the student's responses (one of A, B, C, D, or E per line), and the next $N$ lines are the correct answers (one of A, B, C, D, or E per line), in the same order as the questions. That is, if line $i$ is the student's response to a question, then line $N + i$ is the correct answer to that same question.

Output

Output a single integer $C$ ( $0 \le C \le N$ ): the number of questions the student answered correctly.

Examples2

Example 1
Input
```
3
A
B
C
A
C
B
```
Expected output
```
1
```
Example 2
Input
```
3
A
A
A
A
B
A
```
Expected output
```
2
```