1. Pick up sequentially from each row a letter(one of the four eligible) to create a meaningful expression.
2. Replace each of the 12 letters by a digit (0-3), representing the corresponding column.
3. Give a substantiated explanation of the number thus created.

0 1 2 3
A T L O
H N S P
E G B L
T O A M
A U R S
J T L R
S T O I
S D F M
R F N H
A I L O
A U L N
R R Y G