Problem Statement

You will be given a string $S$ of length $3$ representing the weather forecast for three days in the past.

The $i$-th character $(1 \\leq i \\leq 3)$ of $S$ represents the forecast for the $i$-th day. S, C, and R stand for sunny, cloudy, and rainy, respectively.

You will also be given a string $T$ of length $3$ representing the actual weather on those three days.

The $i$-th character $(1 \\leq i \\leq 3)$ of $S$ represents the actual weather on the $i$-th day. S, C, and R stand for sunny, cloudy, and rainy, respectively.

Print the number of days for which the forecast was correct.

Constraints

• $S$ and $T$ are strings of length $3$ each.
• $S$ and $T$ consist of S, C, and R.

Input

Input is given from Standard Input in the following format:

$S$ $T$

Output

Print the number of days for which the forecast was correct.

Sample Input 1

CSS
CSR

Sample Output 1

2

• For the first day, it was forecast to be cloudy, and it was indeed cloudy.
• For the second day, it was forecast to be sunny, and it was indeed sunny.
• For the third day, it was forecast to be sunny, but it was rainy.

Thus, the forecast was correct for two days in this case.

Sample Input 2

SSR
SSR

Sample Output 2

3

Sample Input 3

RRR
SSS

Sample Output 3

0