The {x,y} tool will match between and (both inclusive) repetitions of character/character class/group.
 
For Example:
w{3,5} : It will match the character w ,  or  times. 
[xyz]{5,} : It will match the character x, y or z  or more times. 
\d{1, 4} : It will match any digits , , , or  times.
Task
You have a test string . 
Your task is to write a regex that will match  using the following conditions: 
-  should begin with  or  digits.
- After that,  should have  or more letters(both lowercase and uppercase).
- Then  should end with up to  .symbol(s). You can end with to.symbol(s), inclusively.
Note
This is a regex only challenge. You are not required to write any code. 
You have to fill the regex pattern in the blank (_________).