Concatenate two different dimensions tnesor

Hi, I want to concate two different dimensions tensor, like x = [[1,2], [3, 4], [5, 6]] , y =[ [1, 1], [2,2]], and the result of concatenate should be z = [[1, 1, 1, 2], [1, 1, 3, 4], [2, 2, 5, 6]].