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Given two numbers **M** and **N**. The task is to find the position of the **rightmost different** bit in the binary representation of numbers.

**Example 1: **

**Input: **M = 11, N = 9
**Output:** 2
**Explanation:** Binary representation of the given
numbers are: 1011 and 1001,
2nd bit from right is different.

**Example 2:**

Input:M = 52, N = 4Output: 5Explanation: Binary representation of the given numbers are: 110100 and 0100, 5th-bit from right is different.

**User Task:**

The task is to complete the function **posOfRightMostDiffBit**() which takes** two arguments m and n** and **returns** the **position of first different bits in m and n**. If both m and n are the same then return **-1** in this case.

**Expected Time Complexity:** O(max(log m, log n)).

**Expected Auxiliary Space:** O(1).

**Constraints:**

1 <= M <= 10^{9}

1 <= N <= 10^{9}

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Rightmost different bit

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