Formating single line of text field inside SSRS report

I have a field with fixed length of 20 characters. Field type is Single Line of Text.

ABCD1234ABCD1234ABCD

I would like to split this string in 5 different pieces like this ABCD 1234 ABCD 1234 ABCD.
One empty space after every 4 characters. This string has no any delimiter, it's only letters and numbers.

Could this maybe be achieved by using standard format function?