1st polygon is valid ...
2nd polygon is valid ...
MULTIPOLYGON(((3592 1893,3398 1893,3398 1759,3592 1759,3910 1759,3910 1893,3592 1893)))
((((3592, 1893), (3398, 1893), (3398, 1759), (3592, 1759), (3910, 1759), (3910, 1893))))
# of points: 6