static int runTestCase(int casenum__) {
		switch (casenum__) {
		case 0: {
			String a = "topcoder";
			String b = "contest";
			String letterSet = "tcp";
			int expected__ = 2;

			return verifyCase(casenum__, expected__, new DistanceBetweenStrings().getDistance(a, b, letterSet));
		}
		case 1: {
			String a = "abcdef";
			String b = "fedcba";
			String letterSet = "fed";
			int expected__ = 0;

			return verifyCase(casenum__, expected__, new DistanceBetweenStrings().getDistance(a, b, letterSet));
		}
		case 2: {
			String a = "aaaaa";
			String b = "bbbbb";
			String letterSet = "a";
			int expected__ = 25;

			return verifyCase(casenum__, expected__, new DistanceBetweenStrings().getDistance(a, b, letterSet));
		}
		case 3: {
			String a = "aaAaB";
			String b = "BbaAa";
			String letterSet = "ab";
			int expected__ = 2;

			return verifyCase(casenum__, expected__, new DistanceBetweenStrings().getDistance(a, b, letterSet));
		}
		case 4: {
			String a = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
			String b = "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb";
			String letterSet = "ba";
			int expected__ = 5000;

			return verifyCase(casenum__, expected__, new DistanceBetweenStrings().getDistance(a, b, letterSet));
		}
		case 5: {
			String a = "ToPcOdEr";
			String b = "tOpCoDeR";
			String letterSet = "wxyz";
			int expected__ = 0;

			return verifyCase(casenum__, expected__, new DistanceBetweenStrings().getDistance(a, b, letterSet));
		}

		// custom cases

		/*
		 * case 6: {
		 * String a = ;
		 * String b = ;
		 * String letterSet = ;
		 * int expected__ = ;
		 * 
		 * return verifyCase(casenum__, expected__, new
		 * DistanceBetweenStrings().getDistance(a, b, letterSet));
		 * }
		 */
		/*
		 * case 7: {
		 * String a = ;
		 * String b = ;
		 * String letterSet = ;
		 * int expected__ = ;
		 * 
		 * return verifyCase(casenum__, expected__, new
		 * DistanceBetweenStrings().getDistance(a, b, letterSet));
		 * }
		 */
		/*
		 * case 8: {
		 * String a = ;
		 * String b = ;
		 * String letterSet = ;
		 * int expected__ = ;
		 * 
		 * return verifyCase(casenum__, expected__, new
		 * DistanceBetweenStrings().getDistance(a, b, letterSet));
		 * }
		 */
		default:
			return -1;
		}
	}