HiddenText/armtatevik			HiddenText/Stephan
n	1	a = input()	n	1	x = input()
	2	b = input()		2	y = input()
	3	c = False		3	z = False
	4			4
n	5	if len(b) > len(a):	n	5	if len(y) > len(x):
	6	print("NO")		6	print("NO")
n	7	elif len(b) == 0:	n	7	elif len(y) == 0:
	8	print("YES")		8	print("YES")
n	9	elif len(b) == 1:	n	9	elif len(y) == 1:
	10	if b in a:		10	if y in x:
	11	print("YES")		11	print("YES")
	12	else:		12	else:
	13	print("NO")		13	print("NO")
	14	else:		14	else:
n	15	for i in range(len(a)):	n	15	for i in range(len(x)):
	16	if c:		16	if z:
	17	break		17	break
n	18	if a[i] == b[0]:	n	18	if x[i] == y[0]:
	19	for k in range(i+1, len(a)):		19	for k in range(i+1, len(x)):
	20	if c:		20	if z:
	21	break		21	break
n	22	if a[k] == b[1]:	n	22	if x[k] == y[1]:
	23	j = k-i		23	j = k-i
	24			24
n	25	p = a[i:i+j*(len(b)):j]	n	25	p = x[i:i+j*(len(y)):j]
	26			26
n	27	if p == b:	n	27	if p == y:
	28	c = True		28	z = True
	29			29
t	30	if c:	t	30	if z:
	31	print('YES')		31	print('YES')
	32	else:		32	else:
	33	print('NO')		33	print('NO')
	34			34

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