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