#include <stdio.h>
#include <string.h>
 
int findMode(int frequency[]) {
    int mode = 0; 
    int maxCount = 0;
 
    for (int i = 0; i < 100; i++) {
        if (frequency[i] > maxCount) {
            maxCount = frequency[i];
            mode = i;
        }
    }
 
    return mode;
}
 
int main() {
    int numbers[1000];
    int current_num;
    int count;
	int n;
	scanf("%d", &n);
 
    for (int i = 0; i < n; i++) {
        count = 0;
		int frequency[101] = {0};
 
        while (scanf("%d", &current_num) == 1 && current_num != 0) {
            frequency[current_num]++;
        }
        int mode = findMode(frequency);
        printf("%d\n", mode);
    }
 
    return 0;
}

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7
3 3 8 3 0
50 60 50 0
1 2 3 4 0
20 20 30 0
99 100 100 0
15 15 10 0
6 6 7 0