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#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
char s[100000];
bool testlitera(char c)
{if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
return 1;
return 0;
}
int main()
{int i,nrl,nrc,n;
fin.getline(s,100000);
nrl=0;nrc=0;
n=strlen(s);
for(i=1;i<n-1;i++)
if(testlitera(s[i])==1)
{nrl++;
if(testlitera(s[i+1])==0) nrc++;
}
if(testlitera(s[n-1])==1) nrc++;
fout<<nrl/nrc;
fin.close();
fout.close();
return 0;
}