// Description:
// Welcome. In this warmup you are required to, given a
// string, replace every letter with its position
// in the alphabet. If anything in the text isn't a letter,
// ignore it and don't return it. a being 1, b being 2,
// etc. As an example:
// alphabet_position("The sunset sets at twelve o' clock.")
// Should return "20 8 5 19 21 14 19 5 20 19 5 20 19 1 20 20
// 23 5 12 22 5 15 3 12 15 3 11" (As a string.)
function alphabetPosition(text) {
// codes goes here
}