In cases like that of the first two, the entire original character has essentially been replaced by a new one, independent of the original's etymology. This type, however, is relatively rare. Another approach is to essentially replace the character with a piece of it, sometimes slightly altered, as in the third and fourth characters. Finally, probably the most common type of simplification is to change one component of the character to reduce the number of strokes and/or make it easier to write, a strategy exemplified by the fifth and sixth examples. Note that, as in the case of the sixth character, the simplification may be very subtle.