If the syllable-final consonant of the first syllable is 'ㄱ, ㄲ, ㅋ, ㄷ, ㅌ, ㅂ, ㅍ, ㅅ, ㅆ, ㅈ, ㅊ' and the second syllable begins with 'ㄱ, ㄷ, ㅂ, ㅅ, ㅈ', the syllable-initial consonant of the second syllable is pronounced with the tensed sound, 'ㄲ, ㄸ, ㅃ, ㅆ, ㅉ'.