Background

Description

Given an array of non-empty strings, create and return a Map<String, String> as follows: for each string add its first character as a key with its last character as the value.

Format

Input

Output

Samples

"code" "bug"

{"b": "g", "c": "e"}

"man" "moon" "main"

{"m": "n"}

"man" "moon" "good" "night"

{"g": "d", "m": "n", "n": "t"}

Limitation

1s, 1024KiB for each test case.