#include <cstdio>
#include <cstring>
#include <ctype.h>
#include <iostream>
using namespace std;
char S[10000200];
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    cin.getline(S,10000200);
    int i=0,k=0,k1=0,l=strlen(S);
    while(i<l)
    {
        ++i;
        if (S[i]!=0)
        {
        if (isalpha(S[i]))
                ++k;
            else if (isalpha(S[i-1]))
                ++k1;
        }
    }
    cout<<k/k1;
    return 0;
}