Contest: Task: Related: TaskB

Score : $100$ points

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.

- $S$ and $T$ are strings of length $3$ each.
- $S$ and $T$ consist of
`S`

,`C`

, and`R`

.

Input is given from Standard Input in the following format:

$S$ $T$

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

CSS CSR

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.

SSR SSR

3

RRR SSS

0