#include <stdio.h>

char crc,tmp;
unsigned long total, cuv,ok,oktmp;

int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);

    while(!feof(stdin))
    {
        scanf("%c",&crc);

        if(crc>64&&crc<91||crc>96&&crc<122)
        {
            ++total;

            ok=1;
        }
            else ok=0;

        if(ok==0&&oktmp==1)
            ++cuv;

        tmp=crc;
        oktmp=ok;
    }

    printf("%d",total/cuv);

}