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# Bulls and Cows

Problem Description

You are playing the Bulls and Cows game with your friend.

You write down a secret number and ask your friend to guess what the number is. When your friend makes a guess, you provide a hint with the following info:

```The number of "bulls", which are digits in the guess that are in the correct position.
The number of "cows", which are digits in the guess that are in your secret number but are located in the wrong position.
Specifically, the non-bull digits in the guess that could be rearranged such that they become bulls. ```

Given the secret number secret and your friend's guess guess, return the hint for your friend's guess.

The hint should be formatted as "xAyB", where x is the number of bulls and y is the number of cows. Note that both secret and guess may contain duplicate digits.

Problem Constraints
```1 <= secret.length, guess.length <= 100000
secret.length == guess.length
secret and guess consist of digits only.
```

Input Format

First argument is string denoting secret string

Second argument is string denoting guess string

Output Format
Return the hint for you friend's guess.

Example Input
Input 1:

```secret = "1807", guess = "7810"
```

Input 2:

```secret = "1123", guess = "0111"
```

Example Output
Ouput 1:

```"1A3B"
```

Ouput 2:

```"1A1B"
```

Example Explanation
Explanation 1:

```Bulls are connected with a '|':
"1807"
|
"7810"```

Explanation 2:

```Bulls are connected with a '|'
"1123"        "1123"
|      or     |
"0111"        "0111"
Note that only one of the two unmatched 1s is counted as a cow since
the non-bull digits can only be rearranged to allow one 1 to be a bull.```

NOTE: You only need to implement the given function. Do not read input, instead use the arguments to the function. Do not print the output, instead return values as specified. Still have a question? Checkout Sample Codes for more details.
Hints
• Hint 1
• Solution Approach
• Complete Solution

## Discussion

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