What is google Pinyin stroke input function

For some rare words, you may not know its pinyin. At this point, you can try to use Google Pinyin provided by the stroke input function. The use of the method is: First press "U" into the stroke input mode, and then use the code H (horizontal), s (vertical), p (apostrophe), n (), z (fold), d (Point) in order to enter the word of each stroke. where N and D are the same, so you don't have to care if a particular pen is a stamp or a point. For example, if you want to enter "valley," you can Press "Upnpnszh" in turn.