SQL Query question

Hello,
I have a funky query that I was wondering if anyone can give me a hand with.

I have two tables, each table has a column that contains a random size number from 1 to 16 characters long. I need to build up a query that will select rows containing the shortest similar number between the 2 tables. To complicate matters worst, one of the tables stores some of its numbers prefixed by a 1, that is if the number is 658398, then this table will store it as 1658398 and the other table will store it as 658398.

Example:
Assume I have the following two tables:

Table 1				Table 2
NUM				NUM
=============			===============
198798734			6784874
8409898				840
1874287430			98798734
1637608				6376084658

The Query must return:
840
98798734
637608

Any help will be greatly appreciated,
Jaime

-- 
Jaime J. Maiz			IH 4F-310
mailto:jmaiz_at_lucent.com		(630) 979-2088