Fill the grid with the numbers 1-7 such that no number repeats in a row or column. The grid is completely covered by thermometer lines. You cannot see them because they are invisible. Nevertheless, numbers increase along thermometers starting from their bulb end. Thermometer lines move orthogonally and diagonally, and do not cross themselves or other thermometers, except at the white diamonds, where they must cross themselves or another thermometer. Thermometers do not pass through Xs. Thermometer bulbs do not touch each other, even diagonally. All thermometers have the same length.