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IList<IList<string>> _Explode(IList<IList<string>> left, IList<IList<string>> right)
{
	if (right.IsNullOrEmpty())
		return left;
	else if (left.IsNullOrEmpty())
		return right;
	var result = new List<IList<string>>();
	foreach (var leftList in left)
	{
		foreach (var rightList in right)
		{
			var finalList = new List<string>();
			finalList.AddRange(leftList);
			finalList.AddRange(rightList); ;
			if (!result.Contains(
				finalList, 
				OrderedCollectionEqualityComparer<string>.Default))
				result.Add(finalList);
		}
	}
	return result;
}

IList<IList<string>> _Explode(IList<IList<string>> left, IList<IList<string>> right)
{
	if (null== right||0==right.Count)
		return left;
	else if (null==left||0==left.Count)
		return right;
	var result = new List<IList<string>>();
	for(int ic=left.Count,i=0;i<ic;++i)
	{
		var leftList = left[i];
		for(int jc=right.Count,j=0;j<jc;++j)
		{
			var rightList = right[j];
			var finalList = new List<string>(ic+jc);
			for(int kc=leftList.Count,k=0;k<kc;++k)
				finalList.Add(leftList[k]);
			for (int kc = rightList.Count, k = 0; k < kc; ++k)
				finalList.Add(rightList[k]);
			var oec = OrderedCollectionEqualityComparer<string>.Default;
			var found = false;
			for (int kc = result.Count, k = 0; k < kc; ++k)
			{
				if (oec.Equals(result[k], finalList))
				{
					found = true;
					break;
				}
			}
			if(!found)
				result.Add(finalList);
		}
	}
	return result;
}