#include <algorithm>
#include <cstdio>
#include <iostream>
#include <map>
#include <cmath>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include <bitset>
using namespace std;
#define FOR(I,A,B) for(int I = (A); I < (B); ++I)
typedef long long ll;

int main()
{
  string s;
  cin >> s;
  string ss;
  cin >> ss;
  s = s + ss;
  int ans = 0;
  int cnt = 0;
  FOR(i,0,s.length()) {
    if(s[i] == 'o') cnt++;
    else {
      cnt = 0;
    }
    ans = max(ans, cnt);
  }
  cout << ans << endl;
  return 0;
}