using System;
using System.Globalization;
using System.Linq;
 
public class Program
{
 
public static void Main(string[] args)
{
            var currTermPairs = new []{ "A", "C", "AA", "B", "CC", "BB" };

            string[][] allArrays = currTermPairs
                .Select((pair, index) => new { pair, index })
                .GroupBy(x => x.index % 2)
                .Select(g => g.Select(x => x.pair).ToArray())
                .ToArray();
                
        foreach(var arr in allArrays)
            Console.WriteLine(string.Join(",",arr));
}
}