Write a python program that converts an input file in fasta format, called
"fasta. txt", to an output file in phylip format called "phylip. txt".
for example if the input file contains:

> human
accgttatac
cgatctcgca
> chimp
acggttatac
cgtacgatcg
> monkey
acctctatac
cgatcgatcc
> gorilla
atctatatac
cgatcgatcg

then the output file should be

human accgttataccgatctcgca
chimp acggttataccgtacgatcg
monkey acctctataccgatcgatcc
gorilla atctatataccgatcgatcg

fasta format has a description (indicated with a '> ') followed by 1 or
more lines of a dna sequence. phylip format has a description followed
by a single line of a dna sequence and each sequence is the same length.
for this homework, the input file will have an arbitrary number of
sequences of arbitrary, but identical, length