You are given a two-digit integer n. Return the sum of its digits.

Example

For n = 29, the output should be addTwoDigits(n) = 11.

Hint

• split()
• parseInt()
• toString()
• reduce()

Input/Output

• [execution time limit] 4 seconds (js)

• [input] integer n

  A positive two-digit integer.

Guaranteed constraints:

10 ≤ n ≤ 99.

• [output] integer

  The sum of the first and second digits of the input number.