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1 초 128 MB1421038474.336%

## 문제

“6 × 9 = 42” is not true for base 10, but is true for base 13. That is, 6(13) × 9(13) = 42(13) because 42(13) = 4 × 131 + 2 × 130 = 54(10).

You are to write a program which inputs three integers p, q, and r and determines the base B (2 ≤ B ≤ 16) for which p × q = r. If there are many candidates for B, output the smallest one. For example, let p = 11, q = 11, and r = 121. Then we have 11(3) × 11(3) = 121(3) because 11(3) = 1 × 31 + 1 × 30 = 4(10) and 121(3) = 1 × 32 + 2 × 31+ 1 × 30 = 16(10). For another base such as 10, we also have 11(10) × 11(10) = 121(10). In this case, your program should output 3 which is the smallest base. If there is no candidate for B, output 0.

## 입력

The input consists of T test cases. The number of test cases (T ) is given in the first line of the input file. Each test case consists of three integers p, q, and r in a line. All digits of p, q, and r are numeric digits and 1 ≤ p, q, r ≤ 1,000,000.

## 출력

Print exactly one line for each test case. The line should contain one integer which is the smallest base for which p × q = r. If there is no such base, your program should output 0.

## 예제 입력 1

3
6 9 42
11 11 121
2 2 2


## 예제 출력 1

13
3
0