#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);
    int i=0,k=0,k1=0;
    scanf("%c",&S[0]);
    while(S[i])
    {
        ++i;
        scanf("%c",&S[i]);
        if (S[i]!=0)
        {
        if (isalpha(S[i]))
                ++k;
            else if (isalpha(S[i-1]))
                ++k1;
        }
    }
    printf("%d",k/k1);
    return 0;
}