#include <bits/stdc++.h>

using namespace std;

const int MX = 100000;

int f(int a, int b, int x, int y, int A, int B) {
	return max((b + B + y - 1) / y - 1, a) + max((a + A + x - 1) / x - 1, b);
}

char s[MX + 1];

int main() {
	int T;
	ignore = scanf("%d", &T);
	while (T--) {
		int x, y, a = 0, b = 0, A = 0, B = 0;
		ignore = scanf(" %s %d %d", s, &x, &y);
		for (int i = 0; s[i] != 0; i++) (s[i] == 'a' ? a : b)++;
		while (a + b > 0) {
			bool giveApple;
			if (B == y) giveApple = true;
			else if (A == x) giveApple = false;
			else if (a == 0) giveApple = false;
			else if (b == 0) giveApple = true;
			else giveApple = f(a - 1, b, x, y, A + 1, 0) < f(a, b - 1, x, y, 0, B + 1);
			
			if (giveApple) {
				if (a > 0) {
					a--;
					printf("a");
				}
				else printf("*");
				
				A++;
				B = 0;
			}
			else {
				if (b > 0) {
					b--;
					printf("b");
				}
				else printf("*");
				
				B++;
				A = 0;
			}
		}
		
		printf("\n");
	}
	
	return 0;
}