I am trying to create a regular expression for this formate. 

X are integers and N is 1 or more[1 to infinity]. ANDY can be lower or upper case

```
ANDY N: XXXXX - XXXXX

/^[\iANDY]\s[\d]{1,}\s[0-9]{4}\s-\s[0-9]{4}$/

```

May I know how to make N more than 0 for this regular expression? and is there anyway to improve it?