#include <iostream>
#include <stdio.h>

using namespace std;

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

    int nrcuv=0, lcuv=0;
    char c, s='N';
    while(!feof(fin)){
        fscanf(fin, "%c", &c);
        //fprintf(fout, "%c", c);
        if(c>='a' && c<='z' || c>='A' && c<='Z'){
            lcuv++;
            s='R';
        }
        else if(s=='R'){
            //fprintf(fout, "\ngata %d\n", nrcuv+1);
            nrcuv++;
            s='N';
        }
    }
    //fprintf(fout, "%d %d\n", lcuv, nrcuv);
    fprintf(fout, "%d", lcuv/nrcuv);
    return 0;
}