Problem: Singh is getting bored at work. He has a lot of ideas (N) to work on (as side projects) but is unable to choose one.

He chooses a random number (R) and lines up his ideas in a circle. He starts counting from first and removes the R^th idea in the circle until only one remains. Help him choose an idea to work on.

Input Format:

no_of_ideas random_number

Output Format:

idea_number

Constraints:

1 ≤ N ≤ 20

1 ≤ R ≤ 10000000

SAMPLE INPUT
5 3

SAMPLE OUTPUT
4

Explanation

List: {1,2,3,4,5}. Start counting from 1,

1 2 3 -> 3 removed

4 5 1 -> 1 removed

2 4 5 -> 5 removed

2 4 2 -> 2 removed

Remaining number: 4

Solution (in PYTHON):

Solution:
n, k = list(map(int, raw_input().strip().split()))
l = [i for i in range(n)]
ind = 0
while len(l) != 1:
    ind = ( ind + k - 1 ) % len(l)
    l = l[0:ind] + l[ind+1:]
print(l[0]+1)