得たり is read as えたり (etari) and means hooray!.
えたり
etari
とくい
one's strong point
とく
rebirth in paradise, entering nirvana
うる
to be able to ...
とくとく
triumphantly
とくてん
scoring
える
to be able to ..., can ...
とくする
to make a profit
とくいさき
(regular) customer
とくしつ
advantages and disadvantages
とくど
becoming a monk
えがたい
hard to get
とくぶん
earnings from land tax (feudal Japan)