S = raw_input()
dp = {(0,0):set([""])}
for i in xrange(len(S)):
	ndp = {}
	for k,s in dp.iteritems():
		for f,b in ((1,0),(0,1)):
			n = (k[0]+f,k[1]+b)
			if n not in ndp:
				ndp[n] = set()
			for v in s:
				ndp[n].add(v+(S[n[0]-1] if f else S[-n[1]]))
	dp = ndp
print len(set(v for s in dp.values() for v in s))