#include<iostream>
#include<string.h>
#include<fstream>
using namespace std;

int main()
{char s[36000];
int n1=0, n2=0, M, i;

ifstream f("text.in");
ofstream g("text.out");

f.getline(s,36000);
for(i=0;i<strlen(s);i++)
if(isdigit(s[i])!=0 || isupper(s[i])!=0 || islower(s[i])!=0)
	{n1++; 	
	if(isdigit(s[i+1])==0 && isupper(s[i+1])==0 && islower(s[i+1])==0)
		n2++;
	}

M=n1/n2;
g<<M;
return 0;}