#include<iostream>
#include<iomanip>
#include<cmath>
#include<string>
#include<algorithm>
#include<vector>
#include<math.h>
#include<stack>
using namespace std;
int main(){
    string S; cin >> S;
    string head, cent, tail;
    if(S.size() % 2 == 0){
            head = S.substr(0, S.size() / 2 );
            tail = S.substr(S.size() / 2, S.size() - 1);
        reverse(tail.begin(), tail.end());
        for(int i = 0; i < S.size() / 2; i++){
            char key;
            if(head[i] == tail[i]){
                if(tail[i] =='>'){
                    tail[i] = '<';
                    head[i] = tail[i];
                }else{
                    tail[i] = '>';
                    head[i] = tail[i];
                }
            }
        }
        reverse(tail.begin(), tail.end());
        cout << head + tail << endl;
    }else{
        head = S.substr(0, (S.size()-1) / 2);
        cent = S[(S.size() - 1) / 2];
        tail = S.substr((S.size() - 1)/ 2+1 , S.size() - 1);
        if(cent == "<") {
            cent = ">";
        }else{
            cent = "<";
        }
        reverse(tail.begin(), tail.end());
        for(int i = 0; i < (S.size() - 1) / 2; i++){
            if(head[i] == tail[i]){
                if(tail[i] =='>'){
                    tail[i] = '<';
                    head[i] = tail[i];
                }else{
                    tail[i] = '>';
                    head[i] = tail[i];
                }
            }
             
        }
        reverse(tail.begin(), tail.end());
        cout << head + cent + tail << endl;
    }
    return 0;
}