#include <bits/stdc++.h>
using namespace std;

int main(void) {
string s;
string sa;
cin>>s;
cin>>sa;
s=s+sa;

int ma=0;
int counter=0;
for (int i = 0; i < 14; ++i) {
	if(s[i]=='o'){
		counter++;
		ma=max(ma,counter);
	}else{
		counter=0;
	}
}
cout<<ma<<endl;

}