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Edit summary for version 3 :
Linked to idiom #141 [Iterate in sequence over two lists]

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Idiom #143 Iterate altenatively over two lists

Iterate alternatively over the elements of the list items1 and items2. For each iteration, print the element.

Idiom #143 Iterate altenatively over two lists

Iterate alternatively over the elements of the list items1 and items2. For each iteration, print the element.