Post making contest 6.0

time to solve this posting puzzle

This post passes rule 2.

a

This post passes rules 4 and 5.

e

This post passes rules 4 and 5.

i

This post passes rule 4.

o

This post passes rules 4 and 5.

did i win the puzzle

This post passes no rules, though it almost passed rule 5.

^{_{y (sometimes)}}

This post passes rule 5.