Quote:
You've considered
TB TB and TB OB but you've neglected OB TB.
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You see, that is what gets to me. In reality, you either have a B as the next child or you don't, so it's a 1/2.
I really shouldn't try to reason when the alarm is set to go off in 4 hours. (I really want to know the answer, but will have to wait until I get home from work.)
