#There is a treasure chest with 1 million dollars. The chest has a 5-digit 
#combination lock that opens under the following conditions: the first digit 
#should be equal to the fifth digit, the second digit should be odd, and the 
#product of the third and forth digits should be divisible by 7. Write a 
#program that reads one 5-digit positive integer and checks whether the input 
#number opens the chest or not. The output should be YES, if the chest opens, 
#and NO otherwise. 


#Discussion:
#Input: one integer, 10000 and 99999, stored in combo
#Calculations, first separate digits, using %10, //10
#use if-else

combo=int(input("enter combination "))

if(combo>=10000 and combo<=99999):
	save_num=combo
	d5=combo%10
	combo=combo//10
	d4=combo%10
	combo=combo//10
	d3=combo%10
	combo=combo//10
	d2=combo%10
	combo=combo//10
	d1=combo%10
	
	if(d1==d5 and d2%2!=0 and (d3*d4)%7==0):
		print("YES", save_num, "opens the chest")
	else:
		print("NO", save_num, "DOESN'T open the chest") 
else:
	print("invalid input")

#Test 1: 77777 YES
#Test 2: 13271 YES
#Test 3: 11111 NO
#Test 4: 22222 NO
#Test 5: 12345 NO
#Test 6: 12271 NO