1-1 2-1 3-1

4-1 5-1 6-1

1-2 2-2 3-2

4-2 5-2 6-2

1-1 2-1 3-1

4-1 5-1 6-1

1-2 2-2 3-2

4-2 5-2 6-2

1과정 2과정 3과정

4과정