I need a regular expression to be used in the form.
The rule is simple, the format must be MMAYY.

**Example of valid MMAYY:**

```
01A21
12B20
01A22

```

**Example of invalid MMAYY:**

```
01121
22A21

```

I tried the below but it will check for MMYY only.

```
^0[1-9]|^(11)|^(12)[0-9][0-9]$

```

Any help will be appreciated. Thank you!