Integers first$\_$item and last$\_$item are read from input, representing the items in an assembly line, with first$\_$item less than last$\_$item. Integer items$\_$counted is initialized with $0.$ For every third item between first$\_$item and last$\_$item, both inclusive:

Output 'Sampling item: $\text{'}$ followed by the item's value.

Increment items$\_$counted.

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Ex: If the input is:

$410$

$413$

then the output is:

Sampling item: $410$

Sampling item: $413$

Total items counted: $2$