Merge Alternating

Merge two strings alternating chars. Example: "abc","12345" => "a1b2c345"

Your task

Implement this function:

def merge_alternating(s1: str, s2: str) -> str:

Write the function only — the arguments are read for you and the return value is printed automatically.

Arguments arrive as one Python literal per line, in this order: s1, s2.

Example

Input

'abc'
'12345'

Output

'a1b2c345'