Given a string that contains only lowercase letters, encode that string with the alphabet cipher.

To encode with the alphabet cipher (I will be using the example `hello`):

 1. First, convert each letter in the string to a number depending on its position in the alphabet (`a` = `1`, `b` = `2`, etc.) Example: `8` `5` `12` `12` `15`
 2. Pad each number to two characters with `0`s. Example: `08` `05` `12` `12` `15`
 3. Join. Example: `0805121215`

## Test cases

 helloworld -> 08051212152315181204
 codegolf -> 0315040507151206
 alphabetcipher -> 0112160801020520030916080518
 johncena -> 1015081403051401

Remember, this is [tag:code-golf], so the code with the fewest number of bytes wins.