#include <bits/stdc++.h>
using namespace std;
int main()
{
    string a,s;
    cin>>s;
    for(int i=0;i<s.length();i++){
        if(s[i]==s[s.length()-i-1]){
            if(s[i]=='<')a.push_back('>');
            else a.push_back('<');
        }else a.push_back(s[i]);
    }
    cout<<a<<endl;
    return 0;
}