def do(tuples):
	for x,y in tuples:print' '*x+'-'*(y-x)
	
def main():
	tests = [(),
			 ((0,7),(5,6),(3,6)),
			 ((5,20),(5,20),(2,10),(15,19)),
			 ((28, 35), (34, 40), (39, 44))]
	c = 1
	for t in tests:
		print `c`,"=>"
		do(t)
		c+=1

if __name__=='__main__':
	main()