#include <stdio.h>
#include <string.h>

char sir[5000000];
int n,k,i,p,nr;

int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    gets(sir);
    n=strlen(sir);
    for(i=0; i<n; ++i)
    {
        if(((sir[i]>96)&&(sir[i]<123))||((sir[i]>64)&&(sir[i]<91)))
        {
            while(((sir[i]>96)&&(sir[i]<123))||((sir[i]>64)&&(sir[i]<91)))
            {
                i++;
                nr++;
            }
            k++;
        }
    }
    printf("%d",nr/k);
}