-(으)ᄂ 덕분에 attached to a verb or an adjective, expresses the cause or the reason of the positive status of the situation.
-ᄂ 덕분에 is added when the stem of a verb or an adjective ends in a vowel or the final consonant, ᄅ.
-은 덕분에 is added when the stem of a verb or an adjective ends in all consonants other than ᄅ.