Răspuns:
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Nr pare ab cu a<b sunt:12,14,16,18,24,26,28,34,36,38,46,48,56,58,68,78
Nr. impare ab cu a<bsunt: 13,15,17,19,23,25,27,29,35,37,39,45,47,49,57,59,67,69,79,89