#include<stdio.h>
int len,nrcuv,ok;
char c;
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    while(scanf("%c",&c)!=-1)
    {
        if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
        {
            len++;
            ok=1;

        }
        else if(ok==1)
        {
            nrcuv++;
            ok=0;
        }
    }
    printf("%d",len/nrcuv);
    return 0;
}