#include<bits/stdc++.h>
using namespace std;
string s;
int len, maxi = 0;
int main(){
	cin >> s;
	for(int i = 0;i < s.size();i++){
		string num = "", sum = "";
		len = 1;
		for(int j = i;j < s.size();j++){
			num += s[j];
			cout << num << endl;
			sum = "";
			for(int k = j;k >= i;k--){
				sum += s[k];
			}
			if(num != sum){
				len++;
				maxi = max(maxi, len);
			}
		} 
		cout << endl;
	}
	cout << maxi;
	return 0;
}