#include <iostream>
#include <vector>
#include <string>

using namespace std;

vector<pair<string, char>> tags(1);
string s;
int open, close, slash;

void correctLetters() {
    int j;
    for (int i = 0; i < tags.size(); i++) {
        if (!tags[i].second) {
            j = i + 1;
            int h = i;
            while (h != j) {
                h++;
                if (!tags[h].second) {
                    j += 2;
                }
            }
            if (tags[j].first.find("$") == -1) {
                tags[i].first = tags[j].first;
            }
            else {
                tags[j].first = tags[i].first;
            }
        }
    }
    for (int i = 0; i < tags.size(); i++) {
        if (tags[i].second) {
            cout << tags[i].first[0] << "/"
                << tags[i].first.substr(1, tags[i].first.size() - 1);
        }
        else {
            cout << tags[i].first;
        }
    }
    return;
}

void cutString() {
    open = 0;
    close = 0;
    slash = 0;
    tags.resize(1);
    for (int i = 0; i < s.size(); i++) {
        if (s[i] != '/') {
            tags[close].first.push_back(s[i]);
        }
        if (s[i] == '>') {
            close++;
            tags.resize(close + 1);
        }
        if (s[i] == '<') {
            open++;
        }
        if (s[i] == '/') {
            slash++;
            if ((tags[close].second == true) && (tags[close].first[0] == '<')) {
                tags[close].first.push_back('$');
                slash--;
            }
            tags[close].second = true;
        }
    }
    tags.pop_back();
}

void correctSlashes() {
    if (slash > open / 2) {
        vector<char> checked(tags.size());
        int j;
        for (int i = 0; i < tags.size(); i++) {
            if (!tags[i].second) {
                j = i + 1;
                int h = i;
                while (j != h) {
                    h++;
                    if (!tags[h].second) {
                        j += 2;
                    }
                }
                if (tags[i].first == tags[j].first) {
                    checked[j] = true;
                }
            }
        }
        int first = -1, second;
        for (int i = 0; i < tags.size(); i++) {
            if ((!checked[i]) && (tags[i].second)) {
                if (first != -1) {
                    second = i;
                    break;
                }
                else {
                    first = i;
                }
            }
        }
        tags[first].first = tags[second].first;
        tags[first].second = false;
    }
    else {
        //
        vector<char> checked(tags.size());
        int j;
        for (int i = tags.size() - 1; i >= 0; i--) {
            if (tags[i].second) {
                j = i - 1;
                int h = i;
                while (j != h) {
                    h--;
                    if (tags[h].second) {
                        j -= 2;
                    }
                }
                if (tags[i].first == tags[j].first) {
                    checked[j] = true;
                    checked[i] = true;
                }
            }
        }
        int first, second = -1;
        for (int i = tags.size() - 1; i >= 0; i--) {
            if ((!checked[i]) && (!tags[i].second)) {
                if (second != -1) {
                    first = i;
                    break;
                }
                else {
                    second = i;
                }
            }
        }
        tags[second].first = tags[first].first;
        tags[second].second = true;

    }
    for (int i = 0; i < tags.size(); i++) {
        if (tags[i].second) {
            cout << tags[i].first[0] << "/"
                << tags[i].first.substr(1, tags[i].first.size() - 1);
        }
        else {
            cout << tags[i].first;
        }
    }
    return;
}

void correctMissingBreckets() {
    //if (open < slash * 2) {
        for (int i = 0; i < s.size() - 1; i++) {
            if (s[i] == '>') {
                s[i + 1] = '<';
            }
        }
    //}
    //if (open < slash * 2) {
        for (int i = 1; i < s.size(); i++) {
            if (s[i] == '<') {
                s[i - 1] = '>';
            }
        }
    //}
    s[s.size() - 1] = '>';
    s[0] = '<';
    cout << s;
    return;

}

void checkAll() {
    if (open == close) {
        if (slash == open / 2) {
            correctLetters();
            return ;
        }
        else {
            correctSlashes();
            return ;
        }
    }
    else {
        if (open + close < slash * 4) {
            correctMissingBreckets();
            return ;
        }
        else if (open + close == slash * 4) {
            for (int i = 1; i < s.size() - 1; i++) {
                if (s[i] == '>') {
                    s[i + 1] = '<';
                }
                if ((s[i] == '<') && (s[i - 1] != '>')) {
                    s[i] = '>';
                }
            }
                s[0] = '<';
                s[s.size() - 1] = '>';
                cout << s;
                return ;
        }
        else {
            for (int i = 1; i < s.size() - 1; i++) {
                if ((s[i] == '<') && (s[i - 1] != '>')) {
                    s[i] = '$';
                    break;
                }
                if ((s[i] == '>') && (s[i + 1] != '<')) {
                    s[i] = '$';
                    break;
                }
            }
            tags.clear();
            cutString();
            checkAll();
        }
    }
}

int main()
{
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    //freopen("xml.in", "r", stdin);
    //freopen("xml.out", "w", stdout);
    cin >> s;
    cutString();
    checkAll();
    return 0;
}