public void CapitalLettersReturnReductionRateOfTwo(char letter)
        {
            var sut    = new Pencil();
            var result = sut.FindCharReductionRate(letter);

            Assert.Equal(2, result);
        }
        public void LowercaseLettersReturnReductionRateOfOne(char letter)
        {
            var sut    = new Pencil();
            var result = sut.FindCharReductionRate(letter);

            Assert.Equal(1, result);
        }