Agyo - Ungyo

One family had 1000 Children, the other had 2 Children http://www.onmarkproductions.com/html/nio.shtml:
 a          hum
 ah       un
Agyo - Ungyo
Alpha - Omega
Beginning - End
Birth - Death
Mouth Open Mouth Closed
Naraen Kongō - Misshaku Kongō
那羅延金剛 - 密迹金剛
ah meaning birth un meaning death
"Ah" is the first letter in the Sanskrit alphabet and "Un" is the last (same in Japanese syllabary too), so the combination symbolically represents all possible outcomes (from alpha to omega) in the cosmic dance of existence http://www.onmarkproductions.com/html/nio.shtml