#include <cstdio>
#include <algorithm>
#include <cstring>
int l, nrc;
bool ok;
char s;
int main()
{
    freopen("text.in", "r", stdin);
    freopen("text.out", "w", stdout);

    while ( scanf("%c", &s) != EOF)
    {
        if (( s <= 'Z' && s >= 'A' ) || ( s <= 'z' && s >= 'a' ))
        {
            l++;
            if (!ok)
                ++ nrc;
            ok = 1;
        }
        else
           ok = 0;
    }
    printf("%d", l / nrc);
    return 0;
}