w = input()
z = input()
a = "watermelon"
b = "beachball"
c = "shrinebell"
t = [a, b, c]
t.sort()
for i in range(3):
	g = []
	for j in range(3):
		if i == j: continue
		g.append(t[j])
	g.sort()
	x = [w, z]
	x.sort()
	if g == x:
		print(t[i])