package me.yukicoder.lv1;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class No0400 {
	public static void main(String[] args) {
		try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
			char[] array = br.readLine().toCharArray();
			int length = array.length;
			
			for (int i = 0; i < length / 2; i++) {
				int idx = length - 1 - i;
				if (array[i] == array[idx]) {
					array[i] = (array[i] == '>') ? '<': '>';
					array[idx] = array[i];
				}
			}

			if (length % 2 != 0) {
				char c = array[length / 2];
				array[length / 2] = (c == '>') ? '<': '>';
			}
			System.out.println(array);

		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}