#include <stdio.h>
#include <string.h>
char txt;
int main()
{
    int length = 0, cuv = 0, med = 0, semn = 1;
    freopen("text.in", "r",stdin);
    freopen("text.out", "w", stdout);
        while ((txt=getchar()) != EOF)
        {
            if (semn == 1)
            if (((txt >= 'a') && (txt <= 'z')) || ((txt >= 'A') && (txt <= 'Z')))
            {
                cuv++;
                semn = 0;
            }
            if (((txt >= 'a') && (txt <= 'z')) || ((txt >= 'A') && (txt <= 'Z')))
                length++;
            else
                semn = 1;
        }
    med =length/cuv;
    printf("%d\n",med);
    return 0;
}