#include <bits/stdc++.h>
using namespace std;
const int Z = 2002, INF = 1e8;
string S, T;
int N, M, ans, d[Z*2][Z], p[Z*2][Z];
void dfs(int loR, int hiR, int *lo, int *hi) {
if(loR > hiR) return;
for(int j = 0; j < M; j++)
for(int i = lo[j]; i <= hi[j]; i++)
d[i][j] = INF;
int rt = (loR + hiR) / 2;
d[rt][0] = 0;
for(int j = 0; j < M; j++) {
for(int i = lo[j]; i <= hi[j]; i++) {
int w = d[i][j];
if(d[i+1][j+1] > w && S[i] == T[j])
d[i+1][j+1] = w, p[i+1][j+1] = 3;
++w;
if(d[i+1][j] > w)
d[i+1][j] = w, p[i+1][j] = 1;
if(d[i][j+1] > w)
d[i][j+1] = w, p[i][j+1] = 2;
}
}
int mMin[M], mMax[M] = {};
fill(mMin, mMin+M, N+N);
int i = rt+N-1, j = M-1;
assert(lo[M-1] <= i && i <= hi[M-1]);
ans = max(ans, (N + M - d[i][j]) / 2 - 1);
while(1) {
mMin[j] = min(mMin[j], i);
mMax[j] = max(mMax[j], i);
if(i == rt && !j) break;
int k = p[i][j];
if(k & 1) --i;
if(k & 2) --j;
}
dfs(loR, rt - 1, lo, mMax);
dfs(rt + 1, hiR, mMin, hi);
}
int main() {
cin >> S >> T;
T += '_';
S += '.';
N = size(S);
M = size(T);
S += S;
for(int _ : {0, 1}) {
if(_) reverse(begin(S), end(S));
int lo[M] = {}, hi[M];
fill(hi, hi + M, 2 * N - 1);
dfs(0, N-1, lo, hi);
}
cout << ans;
}
