#include <cstdio>

char ch;
int car,cuv;
int main(){
    FILE *f = fopen("text.in","r");
    int chr = 0;
    while(fscanf(f,"%c", &ch)!=EOF) {
        if (((ch>='a')&&(ch<='z'))||((ch>='A')&&(ch<='Z'))) {
            car++;
            if (chr==0)
                cuv++;
            chr=1;
        } else {
            chr=0;
        }
    }

    FILE *g = fopen("text.out","w");
    fprintf(g,"%d",car/cuv);

    return 0;
}