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

int main()
{
    FILE *pf,*pg;
    pf=fopen("text.in","r");
    pg=fopen("text.out","w");

    char s[101];

    fgets(s,100,pf);

    int i,k1=0,k2=1;
    for (i=0; i<strlen(s); i++)
        if (isalpha(s[i]))
            k1++;
    for (i=1; i<strlen(s); i++)
        if ((isalpha(s[i])==0) && (isalpha(s[i+1])))
            k2++;
    fprintf(pg,"%d",k1/k2);

    return 0;
}