private int isOneBitDeferent(String binAdress1, String binAdress2) {

		int pos = -1;
		int bitDefer = 0;

		for (int i = 0; i < binAdress1.length(); i++) {
			if (binAdress1.charAt(i) != binAdress2.charAt(i)) {
				pos = i;
				bitDefer++;
			}
		}
		if (bitDefer != 1)
			pos = -1;
		return pos;

	}