Spadework 2020. 3. 4. 08:09

* Solved 기준 브론즈2 단순 풀이

for _ in range(int(input())):
	a,b = input(),input(); l,s = len(a),0
	for i in range(l):
		if(a[i]!=b[i]): s += 1
	print('Hamming distance is {}.'.format(s))