Format of the input file

The input of the program is contained in a text file of two lines, each line specifies the gene order of a genome. Note that the first gene and the last gene of the two genomes must be the same and all the gene must be non-zero. For example, one valid input file contains:

1 -2 3 4 -3 -5 6
1 -3 2 4 5 -2 6