#include<iostream>
#include <bits/stdc++.h>

#define ld long double
#define ll long long
#define IO ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
using namespace std;
const int N = 1e6 + 5, mod = 998244353;

void doWork() {
    string s;
    cin >> s;
    int n = s.size();
    stack<pair<int, char>> st;
    string ans(n/2, '0');


    for (int i = 0; i < s.size(); i += 2) {
        if (i + 1 == s.size() || s[i] != s[i + 1]) {
            cout << "Keine Loesung";
            return;
        }
        bool cur = (s[i] == '<');
        if (st.empty() || st.top().second == cur) {
            st.push({i / 2, cur});
        } else {
            ans[st.top().first] = '[';
            ans[i / 2] = ']';
            st.pop();
        }
    }
    if (st.empty()) {
        cout << ans;
    } else {
        cout << "Keine Loesung";
    }
}

int main() {
    IO
    int t = 1;
    //cin >> t;
    for (int i = 1; i <= t; i++) {
        //  cout << "Case #" << i << ": ";
        doWork();
    }
}