Splitting Data Query

DECLARE @STR VARCHAR(100) = 'Hi how are you doing? I am good.'
DECLARE @dev VARCHAR(1) = ' '

SELECT Split.a.value('.', 'VARCHAR(100)') AS E
FROM (
 SELECT Cast('<M> ' + Replace(Replace(@str, @dev, @dev + '</M><M>'), '.', '') + ' </M>' AS XML) AS yo
 ) a
CROSS APPLY yo.nodes('/M') AS SPLIT(a)