འདོད་ཡོན་རེག་བྱ་སོགས་འཆར་བའི་དུས་ཕུན་སུམ་ཚོགས་པ་ལ།
In the tradition of the Kālacakra, the vowel was o, the consonant was pho, the element was water, and the sense object was form.
Light, Reality, Assembly