Given two sequences, where one is a substring of the other, we define a substring
alignment by matching the substring with the longer sequence and placing gaps
everywhere else. For example if the input is ACCTGTAGG and TGT then the substring
alignment is

ACCTGTAGG
---TGT---

Write a Python program that prints the substring alignment of two unaligned
sequences in a FASTA file. If no substring alignment exists then the program
should print "No alignment found".