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C#

I want to ask you one more about Pair Letter , Example : book it is Pair letter Car it is not Pair letter ,, how do we know about this? Should we must do modulus or not ?

14th Jul 2017, 1:56 PM
lee ratana
1 Answer
+ 1
Could you elaborate on "pair letter"? I've never heard of this before.
14th Jul 2017, 3:07 PM
Cohen Creber
Cohen Creber - avatar