Matha Vandhanam

om mathru devo bhava!

om pithru devo bhava!

om athithi devo bhava!

om acharya devo bhava!

meaning:
I salute my mother first
I salute my father second
I salute my guest third
I salute my teacher fourth

mathru - mother
pithru - father
athithi - guest
acharya - teacher, guru, mentor