class Utility {
	
	static void print(int[] array) {
		for(int elm : array) {
			System.out.print(elm + " ");
		}
		System.out.println();
	}

	static int search(String[] array, String key) {
		int counter = 0;	
		for(String elm: array) {
			if(elm.equals(key)) {
				counter++;
			}	
		}
		return counter;
	}

	static int[] sum(int[] array1, int[] array2) {
		if(array1.length != array2.length) {
			return null;
		}

		int[] newArray = new int[array1.length];
		for(int i = 0; i < newArray.length; i++) {
			newArray[i] = array1[i] + array2[i];
		}

		return newArray;
	}

}