#include<fstream>
#include<cstring>
using namespace std;
int litera(char c)
{if(('A'<=c&&c<='Z')||('a'<=c&&c<='z'))
return 1;
else
return 0;
}
int main()
{char s[100001];
unsigned long int lit=0,cuv=0,i;
ifstream f("text.in");
ofstream g("text.out");
f.get(s,100001);
{if(litera(s[0])==1)
lit++;
for(i=1;i<strlen(s);i++)
if(litera(s[i])==1)
lit++;
else if(litera(s[i-1])==1)
cuv++;
}
if(litera(s[strlen(s)-1])==1)
cuv++;
g<<lit/cuv;
return 0;
}