Given a character matrix, your task is to identify the positions of all squares with a length of at least 3 and output the row and column numbers of the bottom-right corner of these squares. The squares are composed of the same character, and each side has a length of at least 3.

If the matrix is

I L M W Y Q C P Z X J M
A I L Q Q Q Q Q X H V B
Q I G Q Q Q Q Q M R G T
D K V Q Q Q Q Q Z U C R
H W S Q Q Q Q Q N U T E
N T C Q Q Q Q Q V L E Z
S V B A C Y M Q S N P E
M D U L P V G N K X Y P
N T Y D R D V K U L K F
V X P A F H O B W U K K
E P E J Z P F O L N F T
G A A X M R K P P A C P

Please provide the row and column of the bottom-right vertex of the square in the character matrix with a side length of at least 3 (the answer is unique). Notice: All coordinates start from 0.  

Your answer should be in the format <<<[row, column]>>>.