## Task 4 - 210614

Twelve sticks, which lie individually in a row (see illustration), are to be arranged into six "double sticks" (i.e., piles of two adjacent sticks) as follows:

A single stick should jump several times either to the right or to the left, each time (except the last time) exactly three sticks (either three individual sticks or one individual stick and one double stick) should be jumped over. On the last jump, exactly three double sticks should be jumped over.

![](https://cdn.mathpix.com/cropped/2024_06_06_b85a894aa8dbf722a7b3g-0233.jpg?height=123&width=854&top_left_y=658&top_left_x=607)

Describe a series of jumps that meet these requirements!
An example of the desired series is: 1 on 5, 7 on 11, 9 on 12, 4 on 8, 2 on 6, 3 on 10.

Solutions of the I. Round 1981 taken from [5]

### 3.22.2 II. Round 1981, Class 6