Leo Zhuang, who just graduated elementary school, is working hard as always. This time, he has encountered a graphing problem:

Given a line segment from to , determine if the segment is parallel to either the x-axis or the y-axis.

If it is parallel to the x-axis, output `x-axis`

; if it is parallel to the y-axis, output `y-axis`

; if it is parallel to neither axis, output `neither`

.

Can you determine this for him?

#### Constraints

Note that the coordinates of the points will not be identical.

#### Input Specification

The first line will contain the integer coordinates of the first point, and , respectively.

The second line will contain the integer coordinates of the second point, and , respectively.

#### Output Specification

Answer Leo's question: if it is parallel to the x-axis, output `x-axis`

; if it is parallel to the y-axis, output `y-axis`

; if it is parallel to neither axis, output `neither`

.

#### Sample Input 1

```
7 -2
-3 -2
```

#### Sample Output 1

`x-axis`

#### Sample Input 2

```
-5 5
-5 10
```

#### Sample Output 2

`y-axis`

#### Sample Input 3

```
3 3
-3 -3
```

#### Sample Output 3

`neither`

## Comments