Korean does this beautiful thing. Take a consonant you know. Add a stroke. That extra stroke means a strong puff of air. ㄱ becomes ㅋ. ㄷ becomes ㅌ. ㅂ becomes ㅍ. ㅈ becomes ㅊ. Same place in the mouth, just breathier. You already know these sounds. We are just learning the stroke.