Write a function that collates 2 Arrays into one to create the output shown in the examples below:

Example 1

```
A = ["a", "b", "c", "d"]
B = [1, 2, 3]
output = ["a", "b", 1, "c", "d", 2, 3]
```

Example 2

```
A = ["a", "b", "c"]
B = [1, 2, 3, 4, 5]
output = ["a", "b", 1, "c", 2, 3, 4, 5]
```

Example 3

```
A = ["a", "b", "c", "d", "e"]
B = [1, 2]
output = ["a", "b", 1, "c", "d", 2, "e"]
```