#write a program that reads 3 ints and finds maximal and minimal value amng inputs

n1 = int(input("enter first number "))
n2 = int(input("enter second number "))
n3 = int(input("enter third number "))
n4 = int(input("enter forth number "))

if(n1>n2):
	max = n1
	min = n2
else:
	min = n1
	max = n2

if(max < n3):
	max = n3
if(max < n4):
	max = n4
if(min > n3):
	min = n3
if(min > n4):
	min = n4

print("max is ", max)
print("min is ", min)