def b(s,e,q=1):
	x=y='';u,v=s,e
	if str(s)==s:
		x=s
		s=[7,-6]["-"in s]
		u=s-.5
	if str(e)==e:
		y=e
		e=[6,-7]["-"in e]
		v=e+.5
	if u>v:s,e=e,s;q=-1
	r=range(s,e+1)
	if y:r+=[y]
	try:r.insert(r.index(-6),'-bleen')
	except:0
	try:r.insert(r.index(7),'bleen')
	except:0
	return r[::q]
 
print list(b('bleen','-bleen'))		# Failure
print list(b('bleen',3))
print list(b(2,'-bleen'))
print
print
print list(b(-10,'-bleen'))			# Success
print list(b('bleen','bleen'))
print list(b('-bleen','bleen'))
print list(b(-10,'bleen'))
print
print list(b('-bleen','-bleen'))
print list(b('-bleen',6))
print list(b('-bleen',10))
print list(b('bleen',10))
print list(b(-10,10))
print list(b(0,0))
print
print list(b(10,-10))

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