#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>

//#include<bits/stdc++.h>



using namespace std;

int gcd(int x,int y){
	return y?gcd(y,x%y):x;
}


int main() {
	
	unsigned char s[999];
	scanf("%s",s);

	int r=0,w=0;
	int i=0;
	while(s[i]){
		if(s[i]==-30&&s[i+1]==-128&&s[i+2]==-90){r++,i+=2;}
		else r=0;
	
		w=max(r,w);
		i++;
	}
	cout<<w<<endl;
	return 0;
}