new index	atom name	original index
1	C	13
2	C	14
3	C	11
4	C	12
5	C	9
6	C	10
7	C	7
8	C	8
9	C	5
10	C	6
11	C	3
12	C	4
13	C	1
14	C	2
15	H	23
16	H	24
17	H	21
18	H	22
19	H	19
20	H	20
21	H	17
22	H	18
23	H	15
24	H	16