题解 | #公共子串计算#

a = input().strip()
b = input().strip()
import sys
just1 = False
if a in b:
    print(len(a))
    sys.exit()
if b in a:
    print(len(b))
    sys.exit()
for i in range(min(len(a),len(b))-1,-1,-1):
    for j in range(len(a)-i):
        if a[j:j+i] in b:
            print(i)
            just1 = True
            break
    if just1:
        break