#include <stdio.h>
#include <string.h>
int n,i,lg,cuv;
char c[10240];
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    gets(c);
    n=strlen(c);
    while(n--)
    {
        if((c[i]>='a' && c[i]<='z') || (c[i]>='A' && c[i]<='Z'))
        {
            while((c[i]>='a' && c[i]<='z') || (c[i]>='A' && c[i]<='Z'))
            {
                i++;
                lg++;
            }
            cuv++;
            i++;
        }
        else i++;
    }
    printf("%d",lg/cuv);
    return 0;
}