public static String convert(int x, int y) {
		String stringX = null;
		if (x == 1) {
			stringX = "a";
		} else if (x == 2) {
			stringX = "b";
		} else if (x == 3) {
			stringX = "c";
		} else if (x == 4) {
			stringX = "d";
		} else if (x == 5) {
			stringX = "e";
		} else if (x == 6) {
			stringX = "f";
		} else if (x == 7) {
			stringX = "g";
		} else if (x == 8) {
			stringX = "h";
		}
		return stringX + y;
	}