import string


if __name__ == '__main__':
    total = 0
    nrLitere = 0
    with open('text.in','r') as fh:
        line = fh.readline()
        newWord = False
        for c in line:
            if c not in string.ascii_letters:
                if newWord==True:
                    total += 1
                    newWord = False
            else:
                nrLitere += 1
                if newWord == False:
                    newWord = True

        if newWord == True:
            total += 1

        open('text.out','w').write(str(nrLitere//total))