code: def showDifferences(seq1, seq2) :
  	
  	ret = []
  	for i in range(max(len(seq1), len(seq2))) :
  
  		if i >= len(seq1) :
  			c1 = '#'
  		else :
  			c1 = seq1[i]
  		if i >= len(seq2) :
  			c2 = '#'
  		else :
  			c2 = seq2[i]
  
  		if c1 != c2 :
  			ret.append('%s|%s' % (c1, c2))
  		else :
  			ret.append('-')
  
  	return ''.join(ret)
docs: Returns a string highligthing differences between seq1 and seq2:
  	
  	* Matches by '-'
  	
  	* Differences : 'A|T'
  	
  	* Exceeded length : '#'