#include <cstdio>
#include <iostream>
#include <string>
#include <cctype>
#include <cstdlib>

#define N 1005
#define M 2011

using namespace std;

string s, sum;
int in[N][N];
int y, x, color = 1;
int print[M][M];

void f(string tag) {
    if (tag[1] == '/') {
        return;
    }
    if (tag == "<table>")
        return;
    if (tag == "<tr>") {
        y++;
        x = 0;
        while (in[y][x])
            x++;
        return;
    }
    if (tag == "<td>") {
        if (in[y][x]) {
            puts("ERROR");
            exit(0);
        }
        in[y][x] = color++;
        x++;
        return;
    }
    int row = 1, col = 1;

    if (tag[3] == 'c') {
        tag = tag.substr(12);
        if (tag[1] == '0') {
            tag = tag.substr(3);
            col = 10;
        }
        else {
            tag = tag.substr(2);
            col = int(tag[0] - '0');
        }

        if (tag[0] == 'r') {
            tag = tag.substr(10);
            if (tag[1] == '0') {
                tag = tag.substr(3);
                row = 10;
            }
            else {
                tag = tag.substr(2);
                row = int(tag[0] - '0');
            }
        }
    }
    else {
        tag = tag.substr(12);
        if (tag[1] == '0') {
            tag = tag.substr(3);
            row = 10;
        }
        else {
            tag = tag.substr(2);
            row = int(tag[0] - '0');
        }

        if (tag[0] == 'c') {
            tag = tag.substr(10);
            if (tag[1] == '0') {
                tag = tag.substr(3);
                col = 10;
            }
            else {
                tag = tag.substr(2);
                col = int(tag[0] - '0');
            }
        }
    }
    for (int i = x; i < x + col; i++)
        for (int j = y; j < y + row; j++)
            if (in[j][i]) {
                puts("ERROR");
                exit(0);
            }
            else {
                in[j][i] = color;
            }
    color++;
}

int main() {
    freopen("table.in", "r", stdin);
    freopen("table.out", "w", stdout);

    while (cin >> s) {
        sum += s;
    }

    for (int i = 0; i < sum.size(); i++)
        if (isupper(sum[i]))
            sum[i] = tolower(sum[i]);

    s = "";
    for (int i = 0; i < sum.size(); ) {
        int pos;
        s += sum[i];
        if (sum[i] == '>')
            for (int j = i + 1; j < sum.size(); j++)
                if (sum[j] == '<') {
                    i = j - 1;
                    break;
                }
        i++;
    }
    sum = "";

    bool add = false;
    for (int j = s.size() - 1; j >= 0; j--) {
        if (s[j] == '>')
            add = true;
        if (add)
            sum = s[j] + sum;
    }

    cout << sum << endl;

    for (int i = 0; i < sum.size(); ) {
        for (int j = i + 1; ; j++)
            if (sum[j] == '>') {
                string tag = sum.substr(i, j - i + 1);
                f(tag);

                i = j + 1;
                break;
            }
    }

    for (int i = 0; i < N; i++) {
        int j = 0, k;
        while (!in[i][j]) j++;

        int w;
        for (k = j; k < N; k++) {
            if (!in[i][k]) {
                break;
            }
            w++;
        }

        j = k + 1;
    }

    return 0;
}