License plate

prb1290 International license registration plate car consists of A and B, Arabic numerals, capital letters in Latin alphabet. We assume that to provide a unique number is permitted to use any sequence of letters and numbers.

How many different such numbers?

Specifications

Input

In a single line through the gap two non-negative integers B and A. Both numbers do not exceed 26.

Output

Single number - the answer to the problem.

Problem information

Time Limit: 0.1 seconds
Memory Limit: 64 MB
Balls for the passed test: 5
Complexity: 43% 69/121
Classes: Combinatorics

Example

Example input

3 3

Example output

17576000

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Problems

Lucky number Masha →