When the syllable-final consonant of the first syllable ends in the consonants 'ㄱ, ㄲ, ㅋ, ㄷ, ㅌ, ㅂ, ㅍ, ㅅ, ㅆ, ㅈ, ㅊ' and the syllable-initial consonant of the second syllable begins with 'ㄴ,ㅁ', the preceding consonants must be changed according to the following rule:

Ending Consonant	Pronunciation
ㄱ, ㅋ, ㄲ	[ ㅇ ]
ㅂ, ㅍ	[ ㅁ ]
ㄷ, ㅌ, ㄸ, ㅅ, ㅆ, ㅈ, ㅊ, ㅎ	[ ㄴ ]

ㄱ,ㅋ,ㄲ [ㅇ]

ㅂ, ㅍ [ㅁ]

ㄷ,ㅌ,ㄸ,ㅅ,ㅆ,ㅈ,ㅊ,ㅎ [ㄴ]