if __name__ == "__main__":
	str1 = input()
	str2 = input()
	
	ans = "YES"
	for j in str1:
		num = str2.find(j)
		if num == -1:
			ans = "NO"
			break
		else:
			str2 = str2[:num] + str2[num+1:]
			
	print(ans)