#include <fstream>
using namespace std;int nrCaract, nrCuv;bool cuvBun;char caracter;ifstream fin("text.in");ofstream fout("text.out");int main(){while(!fin.eof()){fin.get(caracter);if(((caracter >='A')&&(caracter<='Z'))||((caracter>='a')&&(caracter<='z'))){nrCaract++;cuvBun=true;}else{if(cuvBun){nrCuv++;cuvBun=false;}}}fout<<nrCaract/nrCuv;return 0;}