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A small boy was squalling in the seat opposite, and Carl took him from his tired mother and lured him into a game of tit-tat-toe.

Here and there were stealthy games of tit-tat-toe, practiced, doubtless, behind the teacher's back.

She had a family tartan—heather brown, with Lincoln green tit-tat-toe crisscrosses—and she had learned how to walk from a thousand years of strong-walking ancestors.

On scraps of paper we played tit-tat-toe; we improvised a checkerboard and played checkers. 

But if slates favored tit-tat-toe, they also favored ciphering, and nothing but good can come from that.