Product – First Largest and Second Largest

The program must accept an integer N as the input. The program must print the product of the first largest digit and the second largest digit in N as the output.

Boundary Condition(s):
10 <= N <= 10^15

Input Format:
The first line contains the integer N.

Output Format:
The first line contains the product of the first largest digit and the second largest digit.

Example Input/Output 1:
Input:
73483

Output:
56

Explanation:
The first largest digit in 73483 is 8.
The second largest digit in 73483 is 7.
The product of 8 and 7 is 56.
Hence the output is 56

Example Input/Output 2:
Input:
37457

Output:
49

n=input().strip()
l=[int(i) for i in n]
l.sort()
h=l[-1]
i=l[-2]
print(h*i)