static int runTestCase(int casenum__) {
		switch (casenum__) {
		case 0: {
			String[] list = { "a", "b", "c", "d" };
			int n = 2;
			String expected__ = "a";

			return verifyCase(casenum__, expected__, new BusinessTasks().getTask(list, n));
		}
		case 1: {
			String[] list = { "a", "b", "c", "d", "e" };
			int n = 3;
			String expected__ = "d";

			return verifyCase(casenum__, expected__, new BusinessTasks().getTask(list, n));
		}
		case 2: {
			String[] list = { "alpha", "beta", "gamma", "delta", "epsilon" };
			int n = 1;
			String expected__ = "epsilon";

			return verifyCase(casenum__, expected__, new BusinessTasks().getTask(list, n));
		}
		case 3: {
			String[] list = { "a", "b" };
			int n = 1000;
			String expected__ = "a";

			return verifyCase(casenum__, expected__, new BusinessTasks().getTask(list, n));
		}
		case 4: {
			String[] list = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r",
					"s", "t",
					"u", "v", "w", "x", "y", "z" };
			int n = 17;
			String expected__ = "n";

			return verifyCase(casenum__, expected__, new BusinessTasks().getTask(list, n));
		}
		case 5: {
			String[] list = { "zlqamum", "yjsrpybmq", "tjllfea", "fxjqzznvg", "nvhekxr", "am", "skmazcey", "piklp",
					"olcqvhg", "dnpo", "bhcfc", "y", "h", "fj", "bjeoaxglt", "oafduixsz", "kmtbaxu",
					"qgcxjbfx", "my", "mlhy", "bt", "bo", "q" };
			int n = 9000000;
			String expected__ = "fxjqzznvg";

			return verifyCase(casenum__, expected__, new BusinessTasks().getTask(list, n));
		}

		// custom cases

		/*
		 * case 6: {
		 * String[] list = ;
		 * int n = ;
		 * String expected__ = ;
		 * 
		 * return verifyCase(casenum__, expected__, new
		 * BusinessTasks().getTask(list, n));
		 * }
		 */
		/*
		 * case 7: {
		 * String[] list = ;
		 * int n = ;
		 * String expected__ = ;
		 * 
		 * return verifyCase(casenum__, expected__, new
		 * BusinessTasks().getTask(list, n));
		 * }
		 */
		/*
		 * case 8: {
		 * String[] list = ;
		 * int n = ;
		 * String expected__ = ;
		 * 
		 * return verifyCase(casenum__, expected__, new
		 * BusinessTasks().getTask(list, n));
		 * }
		 */
		default:
			return -1;
		}
	}