#include <bits/stdc++.h>
#define FOR(i,bg,ed) for(ll i=(bg);i<(ed);i++)
#define REP(i,n) FOR(i,0,n)
#define MOD 1000000007
#define int long long
using namespace std;
typedef long long ll;
typedef vector<vector<ll>> mat;
const int INF = 1e9;



signed main()
{
    string C, C2;

    cin >> C >> C2;
    C += C2;

    int dp[20] = {};
    int ans = 0;
    REP(i,C.length()) {
        if (i == 0) {
            dp[i] = (C[i] == 'o' ? 1 : 0);
            ans = max(ans, dp[i]);
            continue;
        }
        if (C[i] == 'o') {
            dp[i] = dp[i-1] + 1;
        } else {
            dp[i] = 0;
        }
        ans = max(ans, dp[i]);
    }

    cout << ans << endl;
}