#include <cstdio>
#include <cctype>
#include <cstring>
using namespace std;

int nrcuv,len,ok;

int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    char c;
    while( !feof(stdin) )
    {
        scanf("%c",&c);
        if(isalpha(c)) { len++; ok=1; }
        else
            if(ok)
            {
                nrcuv++; ok=0;
            }
    }
    printf("%d",len/nrcuv);
    return 0;
}