2p25(4)

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main (void)
{
	ifstream ins ("input.txt");
	string S;
	while (! ins.eof())
		getline(ins,S);
	int k=0;
	string::size_type i;
	for (i=0; i<S.size();i++)
		if (S[i]>='0' && S[i]<='9')
			k++;
	cout << k << endl;
}