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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
PHP: found [[205564,205570],[205575,205581],[205581,205587],[205612,205618],[205618,205624],[205683,205689],[205730,205736],[205732, 205738 ] ],[205766,205772],[205804,205810]] for kprimesStep(4, 6, 205547, 205982), but the test expected an array with 11 pairs. Which are they?
How would a match that consists of only digits be smaller than zero? That test is redundant.