#include <fstream>
#include <cstring>
#include <cctype>

using namespace std;
ifstream f ("text.in");
ofstream g ("text.out");
int nrcuv, len, n, i;
char a[1000003];
int main()
{
    f.getline(a, 1000000);
    n = strlen(a);
    while(!isalpha(a[ i ])) i++;
    for (i = i + 0; i < n; i++)
    {
        if (isalpha(a[ i ])) len++;
        else if(isalpha(a[ i + 1 ]) && !isalpha(a[ i ])) nrcuv++;
    }
    g << len / (nrcuv + 1) << "\n";
    return 0;
}