#include <iostream>
#include <string>
#include <fstream>
using namespace std;

int main()
{
ifstream in("text.in");
ofstream out("text.out");
string s;
getline(in,s);
int let=0,space=0,words,avr;
for(int i=0;s[i]!='\0';i++){
if(s[i]=='a'||s[i]=='b'||s[i]=='c'||s[i]=='d'||s[i]=='e'||s[i]=='f'||s[i]=='g'||s[i]=='h'||s[i]=='i'||s[i]=='j'||s[i]=='k'||s[i]=='l'||s[i]=='m'||s[i]=='n'){let++;}
else if(s[i]=='o'||s[i]=='p'||s[i]=='q'||s[i]=='r'||s[i]=='s'||s[i]=='t'||s[i]=='u'||s[i]=='v'||s[i]=='w'||s[i]=='x'||s[i]=='y'||s[i]=='z'){let++;}
else if(s[i]==' '){space++;}}
words=space+1;
avr=(let-1)/words+1;
out<<avr;
return 0;
}