prtBase

    class prt
    {
        enum letters { A = 1, B, C, D, E, F, G, H }

        struct Step
        {
            letters l1;
            int n1;

            letters l2;
            int n2;

            public Step(letters il1, int in1, letters il2, int in2)
            {
                l1 = il1;
                n1 = in1;

                l2 = il2;
                n2 = in2;
            }
        }

        private Step[] fst;
        private Step[] scnd;

        public prt()
        {
            List<Step> lfst = new List<Step>();
            List<Step> lscnd = new List<Step>();

            lfst.Add(new Step(letters.A, 1, letters.B, 2));
            lscnd.Add(new Step(letters.A, 1, letters.B, 2));

            lfst.Add(new Step(letters.A, 1, letters.B, 2));
            lscnd.Add(new Step(letters.A, 1, letters.B, 2));

            lfst.Add(new Step(letters.A, 1, letters.B, 2));
            lscnd.Add(new Step(letters.A, 1, letters.B, 2));

            fst = lfst.ToArray();
            scnd = lscnd.ToArray();
        }

        //methods
    }