#include<iostream>

#include<cstdio>
#include<cstring>
using namespace std;
#define inf 10010
struct hi {
    int flag;
    int count;
    char one[40][40];
    int two1[40], two2[40];
    int three[40];
    hi() {
        flag = 0;
        count = 0;
        for (int i = 1; i <= 35; i++) {
            two1[i] = -inf;
            two2[i] = inf;
        }
    }
} a[1010];
void Union(char temp2[40], int temp4, int i, int x) {
    if (strcmp(temp2, "==") == 0) {
        if (temp4 >= a[x].two1[i] && temp4 <= a[x].two2[i])
            a[x].two1[i] = a[x].two2[i] = temp4;
        else
            a[x].flag = 1;
    } else if (strcmp(temp2, ">") == 0) {
        temp4++;
        if (temp4 >= a[x].two1[i] && temp4 <= a[x].two2[i])
            a[x].two1[i] = temp4;
        else if (temp4 < a[x].two1[i])
            ;
        else
            a[x].flag = 1;
    } else if (strcmp(temp2, ">=") == 0) {
        if (temp4 >= a[x].two1[i] && temp4 <= a[x].two2[i])
            a[x].two1[i] = temp4;
        else if (temp4 < a[x].two1[i])
            ;
        else
            a[x].flag = 1;
    } else if (strcmp(temp2, "<") == 0) {
        temp4--;
        if (temp4 >= a[x].two1[i] && temp4 <= a[x].two2[i])
            a[x].two2[i] = temp4;
        else if (temp4 > a[x].two2[i])
            ;
        else
            a[x].flag = 1;
    } else {
        if (temp4 >= a[x].two1[i] && temp4 <= a[x].two2[i])
            a[x].two2[i] = temp4;
        else if (temp4 > a[x].two2[i])
            ;
        else
            a[x].flag = 1;
    }
}
void deal(char temp1[40], char temp2[40], char temp3[40], int x, int num) {
    int len = strlen(temp3), i;
    int temp4 = 0;
    i = 0;
    if (temp3[0] == '-')
        i = 1;
    for (; i < len; i++)
        temp4 = 10 * temp4 + temp3[i] - '0';
    if (temp3[0] == '-')
        temp4 *= -1;
    for (i = 1; i <= num; i++)
        if (strcmp(a[x].one[i], temp1) == 0) {
            Union(temp2, temp4, i, x);
            break;
        }
    if (i == num + 1) {
        a[x].count++;
        strcpy(a[x].one[i], temp1);

        Union(temp2, temp4, i, x);
    }
}
void ans(int x) {
    int arg[1010], l = 0, sign;
    if (a[x].flag == 1) {
        printf("unique\n");
        return;
    }
    for (int i = 1; i < x; i++) {
        sign = 0;
        if (a[i].flag == 1)
            continue;
        for (int j = 1; j <= a[x].count; j++) {
            for (int k = 1; k <= a[i].count; k++)
                if (strcmp(a[x].one[j], a[i].one[k]) == 0)
                    if (a[x].two2[j] < a[i].two1[k]
                            || a[i].two2[k] < a[x].two1[j]) {
                        sign = 1;
                        break;
                    }
            if (sign == 1)
                break;
        }
        if (sign == 0)
            arg[l++] = i;
    }
    if (l == 0) {
        printf("unique\n");
        return;
    } else {
        for (int i = 0; i < l; i++)
            if (i == l - 1)
                printf("%d\n", arg[i]);
            else
                printf("%d ", arg[i]);
    }
}
int main() {
    int n, where;
    char b[300], temp1[40], temp2[40], temp3[40];
    cin >> n;
    getchar();
    for (int i = 1; i <= n; i++) {
        gets(b);
        where = 0;
        int len = strlen(b);
        for (int j = 0; j < len;) {
            if (b[j] == ' ' || b[j] == ',') {
                j++;
                continue;
            }
            if (where == 0) {
                int k = 0;
                while (j < len && b[j] != ' ' && b[j] != ',')
                    temp1[k++] = b[j++];
                temp1[k] = '\0';
                where = 1;
            } else if (where == 1) {
                int k = 0;
                while (j < len && b[j] != ' ' && b[j] != ',')
                    temp2[k++] = b[j++];
                temp2[k] = 0;
                where = 2;
            } else {
                int k = 0;
                while (j < len && b[j] != ' ' && b[j] != ',')
                    temp3[k++] = b[j++];
                temp3[k] = 0;
                where = 0;
                if (a[i].flag == 0)
                    deal(temp1, temp2, temp3, i, a[i].count);
            }
        }
        ans(i);
    }
    return 0;
}