static int runTestCase(int casenum) {
		switch (casenum) {
		case 0: {
			long L = 3L;
			long R = 10L;
			long expected__ = 8L;

			return verifyCase(casenum, expected__, new EllysXors().getXor(L, R));
		}
		case 1: {
			long L = 5L;
			long R = 5L;
			long expected__ = 5L;

			return verifyCase(casenum, expected__, new EllysXors().getXor(L, R));
		}
		case 2: {
			long L = 13L;
			long R = 42L;
			long expected__ = 39L;

			return verifyCase(casenum, expected__, new EllysXors().getXor(L, R));
		}
		case 3: {
			long L = 666L;
			long R = 1337L;
			long expected__ = 0L;

			return verifyCase(casenum, expected__, new EllysXors().getXor(L, R));
		}
		case 4: {
			long L = 1234567L;
			long R = 89101112L;
			long expected__ = 89998783L;

			return verifyCase(casenum, expected__, new EllysXors().getXor(L, R));
		}

		// custom cases

		/*
		 * case 5: {
		 * long L = L;
		 * long R = L;
		 * long expected__ = L;
		 *
		 * return verifyCase(casenum, expected__, new EllysXors().getXor(L, R));
		 * }
		 */
		/*
		 * case 6: {
		 * long L = L;
		 * long R = L;
		 * long expected__ = L;
		 *
		 * return verifyCase(casenum, expected__, new EllysXors().getXor(L, R));
		 * }
		 */
		/*
		 * case 7: {
		 * long L = L;
		 * long R = L;
		 * long expected__ = L;
		 *
		 * return verifyCase(casenum, expected__, new EllysXors().getXor(L, R));
		 * }
		 */
		default:
			return -1;
		}
	}