This one is a part of a classic game -- given a 3x3 board, check if X, O, or neither has won (winner being the one having 3 of their symbols in a row, column, or diagonal).
The input file DATA2.txt will contain 5 sets, 3 lines each. Each line has 3 characters, out of X, O, or period .
The output file OUT2.txt will have 5 lines, a single character (X, O, or period (.)) -- the winner of the game.
Note: you could assume that there is only one winner on each board.
XO. .XO O.X ... .X. ... XXO OOX XOO OOO ... ... O.. O.. O..
X . . O O