/*
 * BUREAU.cpp
 *
 *  Created on: Jun 10, 2014
 *      Author: Arpit Bhayani
 */

#include <cstdio>
#include <cstdlib>
#include <iostream>

using namespace std;

#define DEBUG 0
#define gc getchar
#define ll long long

void scanint(ll int &x) {
    register ll int c = gc();
    x = 0;
    for (; (c < 48 || c > 57); c = gc())
        ;
    for (; c > 47 && c < 58; c = gc()) {
        x = (x << 1) + (x << 3) + c - 48;
    }
}

int readint() {

    int t = 0;
    char ch = getchar();

    while (ch != '\n') {
        t = t * 10 + (ch - '0');
        ch = getchar();
    }

    return t;
}

char readstring() {

    char ret = 'd';
    char ch = getchar();

    if (ch == 'c') {
        ret = 'c';
    }

    while (ch != '\n' && ch != ' ') {
        ch = getchar();
    }

    return ret;
}

int cancel[100010];
int ok[100010];

int main(int argc, char * argv[]) {

    int t;
    scanf("%d", &t);
    while (t--) {

        int n;
        scanf("%d", &n);
        getchar();

        for (int i = 1; i <= n; i++) {

            int c = 0;

            if (readstring() == 'c') {
                c = readint();
                cancel[i] = c;
            } else {
                cancel[i] = 0;
            }

            ok[i] = 1;
        }

        for (int i = 1; i <= n; i++) {
            if (cancel[i] != 0 && ok[i] != 0) {
                //cout << "Cancelling : " << cancel[i] << endl;
                ok[cancel[i]] = 0;
            }
        }

        int count = 0;
        for (int i = 1; i <= n; i++) {
            count += ok[i];
        }

        printf("%d\n", count);

        count = 0;
        for (int i = 1; i <= n; i++) {
            if (ok[i]) {
                if (count != 0) {
                    printf(" ");
                } else {
                    count++;
                }
                printf("%d", i);
            }
        }
        printf("\n");

    }
    return 0;
}