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The problem is to count all the possible paths from top left to bottom right of a **MxN** matrix with the constraints that from each cell you can either move to **right** or **down**.

**Example 1:**

**Input**:
M = 3 and N = 3
**Output:** 6
**Explanation**:
Let the given input 3*3 matrix is filled
as such:
A B C
D E F
G H I
The possible paths which exists to reach
'I' from 'A' following above conditions
are as follows:ABCFI, ABEHI, ADGHI, ADEFI,
ADEHI, ABEFI

**Example 2:**

**Input:**
M = 2 and N = 8
**Output: **8

**Your Task: **

You don't need to read input or print anything. Your task is to complete the function **numberOfPaths()** which takes the integer **M** and integer **N** as input parameters and returns the number of paths..

**Expected Time Complexity:** O(m + n - 1))

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

**Constraints:**

1 ≤ M, N ≤ 10

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Number of paths

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