Write a method called flipLines that accepts a Scanner for an input file and writes to the console the same file’s contents with each pair of lines reversed in order. If the file contains an odd number of lines, leave the last line unmodified. For example, if the file contains:

Twas brillig and the slithy toves

did gyre and gimble in the wabe.

All mimsey were the borogroves,

and the mome raths outgrabe.

your method should produce the following output:

did gyre and gimble in the wabe.

Twas brillig and the slithy toves

and the mome raths outgrabe.

All mimsey were the borogroves,