Feature request: show password subset

Some websites only ask for a subset of a password as part of the login process -- for instance, my bank has a login screen like this:

Account number:
Digits 1, 3 and 4 of your PIN:
Letters 2, 7, and 9 of your password:

The letters/digits being requested change on every login.

The PIN/Password storing is easily accomplished by storing them as separate entities. But with long passwords, finding the "N"th letter is fairly time consuming.

Could Pasaffe have a feature added where I could enter a string, say "2 7 12" and it gives me the 2nd, 7th and 12th password digits?