use proconio::input;
fn main(){
    input!{
        mut s:String,
        s1:String,
    }
    s+=&s1;
    let mut a=0;
    let mut ans=0;
    for i in s.chars(){
        if i=='o'{
            a+=1;
        } else {
            a=0;
        }
        if ans<a{
            ans=a;
        }
    }
    print!("{}",ans);
}