1. descending colon
2. ascending colon
3. sigmoid colon
4. ileocecal valve
5. rectum
6. transverse colon
7. cecum
8. anus

1. 4, 7, 2, 1, 6, 3, 5, 8

2. 4, 7, 2, 6, 1, 5, 3, 8

3. 4, 7, 1, 6, 2, 3, 5, 8

4. 4, 7, 6, 2, 1, 3, 5, 8

5. 4, 7, 2, 6, 1, 3, 5, 8

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