Please, how many trainings do we have?
* without repeating the letters, in the 3 columns
* ex = aab! can not
abc = can, yes
1ªcol 2ª col 3ªcol
a a a
b b b
c c c
we have 3 points each column,
* has to cross each point without having repeated letters on the same line =
* ex = acc = can not, because it repeats the position c
is for lottery socerr
* there can be no repetition of marking on the three lines
* only one letter must pass through each of the 9 points
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