static int runTestCase(int casenum) {
		switch (casenum) {
		case 0: {
			String colors = "RRBRBRBB";
			int expected__ = 3;

			return verifyCase(casenum, expected__, new PenguinPals().findMaximumMatching(colors));
		}
		case 1: {
			String colors = "RRRR";
			int expected__ = 2;

			return verifyCase(casenum, expected__, new PenguinPals().findMaximumMatching(colors));
		}
		case 2: {
			String colors = "BBBBB";
			int expected__ = 2;

			return verifyCase(casenum, expected__, new PenguinPals().findMaximumMatching(colors));
		}
		case 3: {
			String colors = "RBRBRBRBR";
			int expected__ = 4;

			return verifyCase(casenum, expected__, new PenguinPals().findMaximumMatching(colors));
		}
		case 4: {
			String colors = "RRRBRBRBRBRB";
			int expected__ = 5;

			return verifyCase(casenum, expected__, new PenguinPals().findMaximumMatching(colors));
		}
		case 5: {
			String colors = "R";
			int expected__ = 0;

			return verifyCase(casenum, expected__, new PenguinPals().findMaximumMatching(colors));
		}
		case 6: {
			String colors = "RBRRBBRB";
			int expected__ = 3;

			return verifyCase(casenum, expected__, new PenguinPals().findMaximumMatching(colors));
		}
		case 7: {
			String colors = "RBRBBRBRB";
			int expected__ = 4;

			return verifyCase(casenum, expected__, new PenguinPals().findMaximumMatching(colors));
		}

		// custom cases

		/*
		 * case 8: {
		 * String colors = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum, expected__, new
		 * PenguinPals().findMaximumMatching(colors));
		 * }
		 */
		/*
		 * case 9: {
		 * String colors = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum, expected__, new
		 * PenguinPals().findMaximumMatching(colors));
		 * }
		 */
		/*
		 * case 10: {
		 * String colors = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum, expected__, new
		 * PenguinPals().findMaximumMatching(colors));
		 * }
		 */
		default:
			return -1;
		}
	}