#include<iostream>
#include<string>
#include<sstream>
using namespace std;
int main(){
	string a;
	getline(cin, a);
	string w[100];
	int c = 0;
	stringstream X;
	X << a;
	while (X >> w[c++]);
	c--;
	int min;
	min = w[0].size();

	for (int i = 0; i < c; i++){
		if (min > w[i].size()){

			min = w[i].size();
		}

	}
	cout << min;
	system("pause");
	return 0;
}