Jawabanmu

2014-08-29T23:37:33+07:00
ch3

ch3-ch2-ch- ch-ch2-ch3
ch2 ch3
ch3
2014-08-29T23:57:28+07:00
Ch3-ch-ch-ch-ch2 -ch3
| | |
ch3 ch2 ch3
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ch3