#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <cstring>

typedef long long ll;
using namespace std;

#define mod 1000000007
#define INF 1000000000 //(int)1e9
#define LLINF 2000000000000000000 //(ll)2e18
#define PI  3.1415926536

#define SIZE 1000

int main(){
    string s,s2;
    
    cin >> s >> s2;
    
    s+=s2;
    
    int c=0;
    int ans=0;
    
    for(int i=0;i<14;i++){
        c = s[i]=='o' ? c+1 : 0;
        ans = max(ans,c);
    }
    
    printf("%d\n",ans);
    
    return 0;
}