If the straight lines $\,\,\,\,\,$ $\,\,\,\,\,$ ${{x - 1} \over k} = {{y - 2} \over 2} = {{z - 3} \over 3}$ $\,\,\,\,\,$ and$\,\,\,\,\,$ ${{x - 2} \over 3} = {{y - 3} \over k} = {{z - 1} \over 2}$ intersects at a point, then the integer $k$ is equal to