Problem B - Joint Authors
-------------------------

Scientists write papers and present them at conferences.  Often,
several scientists cooperate to write a paper (or article).  Given a
list of papers at a conference and their authors, we'd like to know
who is the most productive scientist.  The productivity is measured by
a weighted total of the number of papers the scientist wrote.  If k
scientists collaborated on a paper, each is assigned a score of 1/k
for that paper.  A scientist's productivity is the total of all these
scores.  For example, if a scientist wrote 1 paper by himself and
another paper in a team of 4 people, then his total score is 5/4.

Input Format
------------

There will be several input instances.  Each instance will begin with
a number, p indicating how many papers appear in the list. This is
followed by p lines, each describing a paper.  These lines will begin
with the number of authors of the paper, followed by a list of their
last names.  (Assume no two scientists at the conference have the same
last name and that each last name is a single word.)  The end of the
input is indicated by a line with p=0.  
You can assume there will not be more than 1000 authors in any input
instance.

Output Format
-------------

For each input instance, output the name of the scientist with the
highest total score on a separate line.  If there is a tie for the most
productive scientist, just output "TIE" instead of a name.

Sample Input
------------

4
3 Turing Church Neumann
1 Turing
2 Church Neumann
1 Godel
4
2 Borodin Cook
1 Herlihy
2 Cook Ellen
3 Borodin Achlioptas Beame
0

Output for Sample Input
-----------------------

Turing
TIE