#include<fstream.h>
#include<string.h>
int main()
{ifstream fin("text.in");
char a[100];
int nrl=0,i,nr=0,j;
fin.getline(a,100);
fin.close();
j=strlen(a);
for(i=1;i<=strlen(a);i++)
{nrl++;
if(a[i]=='-')nrl--;
else if(a[i]==','){nrl--;nr++;}
else if((a[i]=='!')&&(i!=j)) {nrl--;nr++;}
else if((a[i]=='!')&&(i==j)) {nrl--;}
else if(a[i]=='?'){nrl--;}
else if(a[i]==';'){nrl--;}
else if(a[i]==' '){nrl--;nr++;}}
ofstream fout("text.out");
fout<<(int(nrl/nr));
return 0;}