Răspuns :
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4xy --->400, 410 ,420 ,430, 450, 460, 470, 480, 490,405 ,415, 425, 435 ,445 ,455, 46,5 475, 485 ,495
4xy --->400, 410 ,420 ,430, 450, 460, 470, 480, 490,405 ,415, 425, 435 ,445 ,455, 46,5 475, 485 ,495