Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to build a lean to [title] Check what the direction the wind is blowing. [step] You do not want to build a lean-to that's leaning in the direction of wind. Even if the wind is not blowing fast now, it could pick up later and topple your lean-to over.

Ending1: Instead, check the direction at which the wind is blowing. [substeps] If the wind is blowing far west (or west), it is blowing in south-south direction. Ending2: [title] Line the top of your lean-to up with secure material. [step] Some lean-to structures may have a vertical line from the top onto the ground, but ideally, this line should be lowered so that it reaches the ground below. Ending3: If the wind is blowing very sharply or is blowing very fast, then your lean-to should move slightly to one side and do the same to the other. Adjust your placement of your lean-to accordingly. Ending4: [substeps] The easiest way to check the wind's direction is to simply try to feel it. Close your eyes and turn your face until you can feel the wind blowing on you.

Answer format: ending1/ending2/ending3/ending4