#include <bits/stdc++.h>
using namespace std;

#define endl "\n"
#define pb push_back
#define ppb pop_back
#define ff first
#define ss second

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef unsigned int ui;

bool check(string &s) {
    vector<string> fname;
    vector<bool> fcloser;

    for(int i = 0; i < s.size(); ) {
        if(s[i] == '>') return false;
        if(s[i] == '<' && s[i + 1] != '/') {
            int p = i + 1;
            string name;
            while(s[p] != '>') {
                if(p == s.size()) return false;
                if(s[p] == '/') return false;
                if(s[p] == '<') return false;
                name += s[p];
                p++;
                if(p == s.size()) return false;
            }
            fname.pb(name);
            fcloser.pb(false);
            i = p + 1;
        } else
            if(s[i] == '<' && s[i + 1] == '/') {
            int p = i + 2;
            string name;
            while(s[p] != '>') {
                if(s[p] == '/') return false;
                if(s[p] == '<') return false;
                name += s[p];
                p++;
                if(p == s.size()) return false;
            }
            fname.pb(name);
            fcloser.pb(true);
            i = p + 1;
        }
        else i++;
    }

    stack<string> stname;
    stack<bool> stcloser;
    for(int i = 0; i < fname.size(); i++) {
        if(fcloser[i]) {
            if(stname.empty()) return false;
            if(stcloser.top()) return false;
            if(stname.top() != fname[i]) return false;
            stname.pop();
            stcloser.pop();
        } else {
            stname.push(fname[i]);
            stcloser.push(fcloser[i]);
        }
    }

    if(!stname.empty()) return false;

    return true;
}

///Hi There!
int main(int argc, char **argv)
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#else
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    const string sl = "qwertyuiopasdfghjklzxcvbnm<>/";
    string s;

    cin >> s;
    for(int i = 0; i < s.size(); i++) {
        for(int j = 0; j < sl.size(); j++) {
            if(sl[j] == s[i]) continue;
            char t = s[i];
            s[i] = sl[j];
            if(check(s)) {
                cout << s;
                return 0;
            }
            s[i] = t;
        }
    }

    return EXIT_SUCCESS;
}