corrected verse as suggested by JennieG

It's a greeting that you'll hear across Australia
From Geraldton to Goulburn, Gundagai
It's as dinkum as the Dingo and the failure
And you spell it with a G, apostrophe, a D-A-Y

tho the "a" before D-A-Y seems to be superfluous.
do we need to fix that too?