#include <stdio.h>
#define for_i(i, range, inner)                                                 \
    {                                                                          \
        int i;                                                                 \
        for (i = 0; i < range; i++)                                            \
            inner;                                                             \
    }
#define putbool(x) (printf("%s\n", (x) ? "yes" : "no"))
#define bool int
#define true 1
#define false 0

int main() {
    int n;
    scanf("%d\n", &n);
    for_i(i, n, {
        char a[1000];
        int p = -1;
        char c;
        bool flag = 1;
        while ((c = getchar()) != '\n') {
            if (!flag) {
                continue;
            }
            switch (c) {
            case '(':
            case '[':
                a[++p] = c;
                break;
            case ')':
            case ']':
                if (p < 0) {
                    putbool(false);
                    flag = 0;
                    break;
                }
                if (c == ')' && a[p] == '(' || c == ']' && a[p] == '[') {
                    p--;
                } else {
                    putbool(false);
                    flag = 0;
                    break;
                }
                break;
            default:
                break;
            }
        }
        if (flag) {
            putbool(p < 0);
        }
    });
    return 0;
}