The dice have been rolled...

DON'T BE FOOLED BY WHAT YOU SEE, 

THE TWO BECOMES NEW WHEN YOU ADD  3.

ONE IS TOO LONELY, BETTER GIVE IT A MATE,

HE'LL ADD SIXTEEN, THEN SUBTRACT EIGHT.

THE NEXT NUMBER'S IMPORTANT, PLEASE DON'T IGNORE,

A THREE SHALL NOW REPLACE THE FOUR.

FOR THE LAST DIGIT, I'LL BE NICE,

KEEP IT SIMPLE, SUM THE DICE.