#include <bits/stdc++.h>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
string s;
int j, lps[110];
int main()
{
    cin>>s;
    s="A"+s;
    for(int i=1;i<s.size();++i)
        if(s[i]==s[lps[i-1]+1] && lps[i-1]+1<i)
            lps[i]=lps[i-1]+1;
        else
        {
            j=i-1;
            while(s[lps[j]+1]!=s[i] && lps[j]!=0)
                j=lps[j];

            if(lps[j]==0 && s[1]==s[i] && i>1)
                lps[i]=1;
            if(lps[j]!=0 && s[lps[j]+1]==s[i] && lps[j]+1<i)
                lps[i]=lps[j]+1;
        }
    return 0;
}