##### National Olympiad in Informatics, China, 2013

The inner product (a.k.a. dot product) of two -dimensional vectors and is equal to the sum of products of their corresponding components. Specifically:

Given such -dimensional vectors, , Little Meow-Meow would like to know if there exists two vectors whose inner product is a multiple of . Please help her solve this problem.

#### Input Specification

The first line of input contains positive integers , , and ,
respectively representing the number of vectors, the number of
dimensions, and the number of which a inner product could be a
multiple.

The next lines each contains nonnegative integers. On the -th
of these lines, the -th integer represents , the -th
component of vector .

#### Output Specification

Output two integers, separated by a space.

If there exists two vectors and whose inner product is
an integer multiple of , then output their indices and .
If there are multiple answers, output any one of them.

If an answer does not exist, then output two `-1`

's separated by a
space.

#### Sample Input

```
3 5 2
1 0 1 0 1
1 1 0 1 0
0 1 0 1 1
```

#### Sample Output

`2 3`

#### Explanation

#### Constraints

Test Case | ||||
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## Comments