#include <iostream>
#include <stdio.h>
#include <cstring>
using namespace std;
char c,ch;
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    int cnt1=0,cnt2=0;
    while(c!=EOF)
    {
        c=getchar();
        if(isalpha(c))
        {
            cnt2++;
        }
        else if(isalpha(ch))
        {
            cnt1++;
        }
        ch=c;
    }
    cout<<cnt2/cnt1;
    return 0;
}