import sequtils,strutils
var
    a1 = stdin.readline
    a2 = stdin.readline
    ans = 0
a1 &= a2

for i in 0..a1.high:
    for j in 0..a1.high:
        if i + j > a1.high:
            break
        if a1[i + j] != a1[i]:
            break
        ans = max(j + 1, ans)
echo ans