latitude, longitude
examples of valid formats:
36.57854, -118.29342
36.5786°N, 118.2925°W
36.5786N, 118.2925W
36.5786, -118.2925
N36.5786°, W118.2925°
N 36° 34.713 W 118° 17.605
N 36°34'43" W 118°17'36"
others may work too

longitude, latitude