#include <cstdio>
#include <cstring>

using namespace std;

#define maxn 4010000

int n, i, j, k, cs, lg, nr;
char s;

int main()
{
    freopen("text.in", "r", stdin);
    freopen("text.out", "w", stdout);

    while(scanf("%c", &s)==1)
    {
        if((s>='a' && s<='z') || (s>='A' && s<='Z'))
        {
            ++lg;
            cs=1;
        }
        else
        {
            nr+=cs;
            cs=0;
        }
    }
    printf("%d\n", lg/nr);

    return 0;
}