题解 | #公共子串计算#

import sys

while True:
    try:
        str1 = input().strip()
        str2 = input().strip()
        n1 = len(str1)
        n2 = len(str2)
        com = 0
        if n1>n2:
            str1,str2 = str2,str1
            n1,n2 =n2,n1
        for i in range(n1):
            for j in range(i,n1):
                str3 = str1[i:j+1]
                dist = j-i+1
                if str3 in str2 and dist > com:
                    com = dist
        print(com)

    except:
        break