#include "cstdio"

using namespace std;

int main()
{
    int nr(0),nrcuv(0);
    char c,ok(0);
    FILE* fin=fopen("text.in","r");
    FILE* fout=fopen("text.out","w");

    while(!feof(fin))
    {
        c=fgetc(fin);
        if((c>='A' && c<='Z') || (c>='a' && c<='z'))
        {
            nr++;
            if(ok==0)
            {
                nrcuv++;
                ok=1;
            }
        }
        else
            ok=0;
    }

    fprintf(fout,"%d",nr/nrcuv);
    return 0;
}