a = input()
b = input()
s = []
if len(a) > len(b):
    a, b = b, a    # a存短的字符串
n = len(a)
for i in range(0, n):
    for j in range(0,i + 1):
        if a[j:n- i + j] in b:
            s.append(len(a[j:n - i + j]))
s.append(0)
print(max(s))