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#include <cstdio>

int main() {
    int testow;
    scanf("%d", &testow);

    while (testow --> 0) {
        int dlugosc;
        int palindrom;
        scanf("%d %d", &dlugosc, &palindrom);
        if (dlugosc <= palindrom*2) {
            for (int i=0; i<palindrom; ++i) {
                putchar('P');
            }
            for (int i=palindrom; i<dlugosc && i < palindrom*2; ++i) {
                putchar('A');
            }
            putchar('\n');
		} else if (palindrom == 3 and dlugosc == 7) {
			printf("PPPAPAA\n");
		} else if (palindrom == 3 and dlugosc == 8) {
			printf("PPPAPAAA\n");
        } else if (4 <= palindrom) {
            for (int i=0; i<palindrom; ++i) {
                putchar('P');
            }
            int znakow = palindrom;
            while (znakow+6 <= dlugosc) {
                printf("APAAPP");
                znakow += 6;
            }
            for (int i=0; znakow < dlugosc; ++znakow, ++i) {
                putchar("APAAPP"[i]);
            }
            putchar('\n');
        } else {
            printf("NIE\n");
        }
    }
}