sb = input()
N = int(input())
sa = input()
def solve():
	sb_o = sb.count('o')
	sa_o = sa.count('o')

	if sb == sa and N % 2 == 0:
		return False
	if sb_o != sa_o:
		return True

	if sb_o == 1:
		return abs(sb.find('o')-sa.find('o')) > N
	else:
		return abs(sb.find('x')-sa.find('x')) > N

print('SUCCESS' if solve() else 'FAILURE')