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#include <fstream>
#include <cstring>
#include <cctype>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
int i,nrl,nrcuv,k,n;
char c[1048578];
int main()
{
fin.getline(c,1048578);
n=strlen(c);
for(i=0;i<n;i++)
{
if(isalpha(c[i])!=0)
{
nrl++;
if(k==0)
{
nrcuv++;
k=1;
}
}
else
k=0;
}
if(nrcuv!=0)
fout<<nrl/nrcuv;
else
fout<<0;
return 0;
}