#abc277a. [abc277_a]^{-1}

[abc277_a]^{-1}

Problem Statement

You are given a sequence PP that is a permutation of (1,2,,N)(1,2,…,N), and an integer XX. The ii-th term of PP has a value of PiP_i. Print kk such that Pk=XP_k = X.

Constraints

  • 1leqNleq1001 \\leq N \\leq 100
  • 1leqXleqN1 \\leq X \\leq N
  • PP is a permutation of (1,2,,N)(1,2,…,N).
  • All values in the input are integers.

Input

The input is given from Standard Input in the following format:

NN XX P1P_1 P2P_2 ldots\\ldots PNP_N

Output

Print the answer.


Sample Input 1

4 3
2 3 1 4

Sample Output 1

2

We have P=(2,3,1,4)P = (2,3,1,4), so P2=3P_2 = 3. Thus, you should print 22.


Sample Input 2

5 2
3 5 1 4 2

Sample Output 2

5

Sample Input 3

6 6
1 2 3 4 5 6

Sample Output 3

6