Someone

from random import randint

def scramble3():
	a=0
	b=0
	c=0
	scramble = ""
	turns=['U','F','R','L','B','D']
	directions=['\' ', '2 ', ' ']
	for x in range(25):
		while c==b:
			c=randint(0,5)
		if c==a and a+b==5:
			d=c
			while c==d or c==b:
				c=randint(0,5)
		scramble+=turns[c]
		d=randint(0,2)
		scramble+=directions[d]
		a=b
		b=c
	return scramble

def scramble4():
	moves=['R','U','F','L','D','B','r','u','f','l','d','b']
	turns=[' ', '\' ', '2 ']
	check=[0,0,0,0]
	prem=randint(0,11)
	scramble=""
	for i in range(40):
		m=randint(0,11)
		while m==prem:
			m=randint(0,11)
		if m%3==prem%3:
			x=m/3
			if x==3 or x==2:
				y=swap(x)
			else:
				y=x
			while check[x]==1 or check[y]==1:
				m=randint(0,11)
				if m%3!=prem%3:
					check=[0,0,0,0]
				if x==3 or x==2:
					y=swap(x)
				else:
					y=x
		else:
			check=[0,0,0,0]
			check[m/3]=1
			x=randint(0,2)
			scramble+=moves[m]+turns[x]
			prem=m
	return scramble

def scramble2():
	turns = ['\' ', '2 ', ' ']
	faces = ['U', 'F', 'R']
	x = randint(0,2); z = randint(0,2); axis=x; scramble=""
	for j in range(15):
		while x==axis:
			x = randint(0,2)
			z = randint(0,2)
			scramble+=faces[x]+turns[z]
		axis=x
	return scramble

def scramble2g():
	turns=['\' ', '2 ', ' ']
	scramble=""
	for x in range(8):
		scramble+='R'+turns[randint(0,2)]+'U'+turns[randint(0,2)]
	return scramble
    
def scrambleroux():
	turns=['\' ', '2 ', ' ']
	scramble=""
	for x in range(8):
		scramble+='M'+turns[randint(0,2)]+'U'+turns[randint(0,2)]
	return scramble
	
def swap(x):
	if x%2==0:
		return x+1
	return x-1
	
scrambles={'3':scramble3,'4':scramble4,'2g':scramble2g,'roux':scrambleroux, '2':scramble2}
ans=''
print "Options are: %s" % ' '.join(scrambles.keys())
while True:
	ans=raw_input("")
	try:
		print scrambles[ans]()
	except KeyError:
		print "Invalid option"
		print "Options are: %s" % ' '.join(scrambles.keys())